diff --git a/rules-tests/TypedCollections/Rector/Property/NarrowPropertyUnionToCollectionRector/Fixture/narrow_intersection.php.inc b/rules-tests/TypedCollections/Rector/Property/NarrowPropertyUnionToCollectionRector/Fixture/narrow_intersection.php.inc
new file mode 100644
index 00000000..e94abfbb
--- /dev/null
+++ b/rules-tests/TypedCollections/Rector/Property/NarrowPropertyUnionToCollectionRector/Fixture/narrow_intersection.php.inc
@@ -0,0 +1,33 @@
+<?php
+
+namespace Rector\Doctrine\Tests\TypedCollections\Rector\Property\NarrowPropertyUnionToCollectionRector\Fixture;
+
+use Doctrine\Common\Collections\Collection;
+use Rector\Doctrine\Tests\TypedCollections\Rector\Property\NarrowPropertyUnionToCollectionRector\Source\SomeIterableObject;
+
+final class NarrowIntersection
+{
+    /**
+     * @var (Collection & iterable<SomeIterableObject>)
+     */
+    public $items;
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Doctrine\Tests\TypedCollections\Rector\Property\NarrowPropertyUnionToCollectionRector\Fixture;
+
+use Doctrine\Common\Collections\Collection;
+use Rector\Doctrine\Tests\TypedCollections\Rector\Property\NarrowPropertyUnionToCollectionRector\Source\SomeIterableObject;
+
+final class NarrowIntersection
+{
+    /**
+     * @var \Doctrine\Common\Collections\Collection<SomeIterableObject>
+     */
+    public $items;
+}
+
+?>
diff --git a/rules-tests/TypedCollections/Rector/Property/NarrowPropertyUnionToCollectionRector/Source/SomeIterableObject.php b/rules-tests/TypedCollections/Rector/Property/NarrowPropertyUnionToCollectionRector/Source/SomeIterableObject.php
new file mode 100644
index 00000000..a530fc15
--- /dev/null
+++ b/rules-tests/TypedCollections/Rector/Property/NarrowPropertyUnionToCollectionRector/Source/SomeIterableObject.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Rector\Doctrine\Tests\TypedCollections\Rector\Property\NarrowPropertyUnionToCollectionRector\Source;
+
+class SomeIterableObject
+{
+
+}
diff --git a/rules/TypedCollections/DocBlockProcessor/UnionCollectionTagValueNodeNarrower.php b/rules/TypedCollections/DocBlockProcessor/UnionCollectionTagValueNodeNarrower.php
index 15f81d56..f1329157 100644
--- a/rules/TypedCollections/DocBlockProcessor/UnionCollectionTagValueNodeNarrower.php
+++ b/rules/TypedCollections/DocBlockProcessor/UnionCollectionTagValueNodeNarrower.php
@@ -35,37 +35,46 @@ public function narrow(
         }
 
         if ($tagValueNode->type instanceof NullableTypeNode) {
-            if ($hasNativeCollectionType) {
-                $tagValueNode->type = $tagValueNode->type->type;
-                $tagValueNode->setAttribute(PhpDocAttributeKey::ORIG_NODE, null);
-
-                $collectionType = $tagValueNode->type;
-                $this->addIntKeyIfMissing($collectionType);
-
-                if ($collectionType->type instanceof IdentifierTypeNode && ! str_ends_with(
-                    $collectionType->type->name,
-                    'Collection'
-                )) {
-                    $collectionType->type = new FullyQualifiedIdentifierTypeNode(DoctrineClass::COLLECTION);
-                }
+            return $this->processNullableTypeNode($hasNativeCollectionType, $tagValueNode);
+        }
 
-                return true;
-            }
+        return $this->processIterableAndUnionTypeNode($tagValueNode, $hasNativeCollectionType);
+    }
 
-            return false;
+    private function addIntKeyIfMissing(TypeNode|IdentifierTypeNode $collectionType): void
+    {
+        if (! $collectionType instanceof GenericTypeNode) {
+            return;
+        }
+
+        if (count($collectionType->genericTypes) !== 1) {
+            return;
         }
 
+        // add default key type
+        $collectionType->genericTypes = array_merge([new IdentifierTypeNode('int')], $collectionType->genericTypes);
+    }
+
+    private function processIterableAndUnionTypeNode(
+        ParamTagValueNode|VarTagValueNode|ReturnTagValueNode $tagValueNode,
+        bool $hasNativeCollectionType
+    ): bool {
         if (! $tagValueNode->type instanceof UnionTypeNode && ! $tagValueNode->type instanceof IntersectionTypeNode) {
             return false;
         }
 
         $hasChanged = false;
-        $hasCollectionType = false;
         $hasArrayType = false;
         $arrayTypeNode = null;
         $arrayKeyTypeNode = null;
 
-        foreach ($tagValueNode->type->types as $key => $unionedTypeNode) {
+        // has collection docblock type?
+        $hasCollectionType = $this->hasCollectionDocblockType($tagValueNode->type);
+        $hasGenericIterableType = false;
+
+        $complexTypeNode = $tagValueNode->type;
+
+        foreach ($complexTypeNode->types as $key => $unionedTypeNode) {
             // possibly array<key, value>
             if ($unionedTypeNode instanceof GenericTypeNode && $unionedTypeNode->type->name === 'array') {
                 $hasArrayType = true;
@@ -88,29 +97,29 @@ public function narrow(
             }
 
             // remove |null, if property type is present as Collection
-            if ($unionedTypeNode instanceof IdentifierTypeNode && $unionedTypeNode->name === 'null' && $hasNativeCollectionType) {
-
-                $hasChanged = true;
-                unset($tagValueNode->type->types[$key]);
-                continue;
-            }
+            if ($unionedTypeNode instanceof IdentifierTypeNode) {
+                if ($unionedTypeNode->name === 'null' && $hasNativeCollectionType) {
+                    $hasChanged = true;
+                    unset($tagValueNode->type->types[$key]);
+                    continue;
+                }
 
-            if ($unionedTypeNode instanceof IdentifierTypeNode && in_array(
-                $unionedTypeNode->name,
-                ['Collection', 'ArrayCollection']
-            )) {
                 if ($unionedTypeNode->name === 'ArrayCollection') {
                     $tagValueNode->type->types[$key] = new IdentifierTypeNode('\\' . DoctrineClass::COLLECTION);
                     $hasChanged = true;
                 }
-
-                $hasCollectionType = true;
             }
 
             // narrow array collection to more generic collection
-            if ($unionedTypeNode instanceof GenericTypeNode && $unionedTypeNode->type->name === 'ArrayCollection') {
+            if ($unionedTypeNode instanceof GenericTypeNode && in_array(
+                $unionedTypeNode->type->name,
+                ['ArrayCollection', 'iterable'],
+                true
+            )) {
                 $unionedTypeNode->type = new IdentifierTypeNode('\\' . DoctrineClass::COLLECTION);
                 $hasChanged = true;
+
+                $hasGenericIterableType = true;
             }
         }
 
@@ -118,6 +127,16 @@ public function narrow(
             return false;
         }
 
+        // remove duplicated Collection and Collection generics type
+        if ($hasCollectionType && $hasGenericIterableType) {
+            foreach ($complexTypeNode->types as $key => $singleType) {
+                if ($this->isCollectionIdentifierTypeNode($singleType)) {
+                    // remove as has generic iterable type already
+                    unset($complexTypeNode->types[$key]);
+                }
+            }
+        }
+
         if ($arrayTypeNode instanceof TypeNode) {
             $tagValueNode->type = new GenericTypeNode(new IdentifierTypeNode('\\' . DoctrineClass::COLLECTION), [
                 $arrayKeyTypeNode ?? new IdentifierTypeNode('int'),
@@ -130,6 +149,7 @@ public function narrow(
                 }
 
                 if ($hasNativeCollectionType && $type->name === 'null') {
+                    // remove null type
                     unset($tagValueNode->type->types[$key]);
                     continue;
                 }
@@ -154,11 +174,53 @@ public function narrow(
         return true;
     }
 
-    private function addIntKeyIfMissing(TypeNode|IdentifierTypeNode $collectionType): void
+    private function hasCollectionDocblockType(UnionTypeNode|IntersectionTypeNode $complexTypeNode): bool
     {
-        if ($collectionType instanceof GenericTypeNode && count($collectionType->genericTypes) === 1) {
-            // add default key type
-            $collectionType->genericTypes = array_merge([new IdentifierTypeNode('int')], $collectionType->genericTypes);
+        foreach ($complexTypeNode->types as $singleType) {
+            if ($this->isCollectionIdentifierTypeNode($singleType)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private function processNullableTypeNode(
+        bool $hasNativeCollectionType,
+        ParamTagValueNode|VarTagValueNode|ReturnTagValueNode $tagValueNode
+    ): bool {
+        if ($hasNativeCollectionType === false) {
+            return false;
         }
+
+        // unwrap nullable type
+        $tagValueNode->type = $tagValueNode->type->type;
+
+        // invoke reprint
+        $tagValueNode->setAttribute(PhpDocAttributeKey::ORIG_NODE, null);
+
+        $collectionType = $tagValueNode->type;
+        $this->addIntKeyIfMissing($collectionType);
+
+        if ($collectionType->type instanceof IdentifierTypeNode && ! str_ends_with(
+            $collectionType->type->name,
+            'Collection'
+        )) {
+            $collectionType->type = new FullyQualifiedIdentifierTypeNode(DoctrineClass::COLLECTION);
+        }
+
+        return true;
+    }
+
+    private function isCollectionIdentifierTypeNode(TypeNode $typeNode): bool
+    {
+        if (! $typeNode instanceof IdentifierTypeNode) {
+            return false;
+        }
+
+        return in_array(
+            $typeNode->name,
+            [DoctrineClass::COLLECTION, DoctrineClass::ARRAY_COLLECTION, 'Collection', 'ArrayCollection']
+        );
     }
 }
diff --git a/rules/TypedCollections/Rector/Property/NarrowPropertyUnionToCollectionRector.php b/rules/TypedCollections/Rector/Property/NarrowPropertyUnionToCollectionRector.php
index 7ae3fe55..4260d711 100644
--- a/rules/TypedCollections/Rector/Property/NarrowPropertyUnionToCollectionRector.php
+++ b/rules/TypedCollections/Rector/Property/NarrowPropertyUnionToCollectionRector.php
@@ -151,7 +151,6 @@ private function refactorPropertyDocBlock(Property $property): bool
         }
 
         $varTagValueNode = $propertyPhpDocInfo->getVarTagValueNode();
-
         if (! $varTagValueNode instanceof VarTagValueNode) {
             return false;
         }