diff --git a/src/Services/EntityMergers/Mergers/EntityMergerHelperTrait.php b/src/Services/EntityMergers/Mergers/EntityMergerHelperTrait.php
index 2eb3ff88..ae3c75b9 100644
--- a/src/Services/EntityMergers/Mergers/EntityMergerHelperTrait.php
+++ b/src/Services/EntityMergers/Mergers/EntityMergerHelperTrait.php
@@ -153,6 +153,54 @@ trait EntityMergerHelperTrait
         );
     }
 
+    /**
+     * Perform an OR operation on the boolean values from the target and the other entity for the given field.
+     * This effectively means that the value is true, if it is true in at least one of the entities.
+     * @param  object  $target
+     * @param  object  $other
+     * @param  string  $field
+     * @return object
+     */
+    protected function useTrueValue(object $target, object $other, string $field): object
+    {
+        return $this->useCallback(
+            function (bool $target_value, bool $other_value): bool {
+                return $target_value || $other_value;
+            },
+            $target,
+            $other,
+            $field
+        );
+    }
+
+    /**
+     * Perform a merge of comma separated lists from the target and the other entity for the given field.
+     * The values are merged and duplicates are removed.
+     * @param  object  $target
+     * @param  object  $other
+     * @param  string  $field
+     * @return object
+     */
+    protected function mergeTags(object $target, object $other, string $field, string $separator = ','): object
+    {
+        return $this->useCallback(
+            function (string $t, string $o) use ($separator): string {
+                //Explode the strings into arrays
+                $t_array = explode($separator, $t);
+                $o_array = explode($separator, $o);
+
+                //Merge the arrays and remove duplicates
+                $tmp = array_unique(array_merge($t_array, $o_array));
+
+                //Implode the array back to a string
+                return implode($separator, $tmp);
+            },
+            $target,
+            $other,
+            $field
+        );
+    }
+
     /**
      * Merge the collections from the target and the other entity for the given field and put all items into the target collection.
      * @param  object  $target
diff --git a/src/Services/EntityMergers/Mergers/PartMerger.php b/src/Services/EntityMergers/Mergers/PartMerger.php
index c25d0dc6..a3962118 100644
--- a/src/Services/EntityMergers/Mergers/PartMerger.php
+++ b/src/Services/EntityMergers/Mergers/PartMerger.php
@@ -55,7 +55,12 @@ class PartMerger implements EntityMergerInterface
         //We assume that the higher value is the correct one for minimum instock
         $this->useLargerValue($target, $other, 'minamount');
 
+        //We assume that a part needs review and is a favorite if one of the parts is
+        $this->useTrueValue($target, $other, 'needs_review');
+        $this->useTrueValue($target, $other, 'favorite');
 
+        //Merge the tags using the tag merger
+        $this->mergeTags($target, $other, 'tags');
 
         return $target;
     }
diff --git a/tests/Services/EntityMergers/Mergers/PartMergerTest.php b/tests/Services/EntityMergers/Mergers/PartMergerTest.php
index c9b7956c..591172b3 100644
--- a/tests/Services/EntityMergers/Mergers/PartMergerTest.php
+++ b/tests/Services/EntityMergers/Mergers/PartMergerTest.php
@@ -20,6 +20,10 @@
 
 namespace App\Tests\Services\EntityMergers\Mergers;
 
+use App\Entity\Parts\Category;
+use App\Entity\Parts\Footprint;
+use App\Entity\Parts\Manufacturer;
+use App\Entity\Parts\MeasurementUnit;
 use App\Entity\Parts\Part;
 use App\Entity\Parts\PartLot;
 use App\Services\EntityMergers\Mergers\PartMerger;
@@ -38,11 +42,65 @@ class PartMergerTest extends KernelTestCase
         $this->merger = self::getContainer()->get(PartMerger::class);
     }
 
+    public function testMergeOfEntityRelations(): void
+    {
+        $category = new Category();
+        $footprint = new Footprint();
+        $manufacturer1 = new Manufacturer();
+        $manufacturer2 = new Manufacturer();
+        $unit = new MeasurementUnit();
+
+        $part1 = (new Part())
+            ->setCategory($category)
+            ->setManufacturer($manufacturer1);
+
+        $part2 = (new Part())
+            ->setFootprint($footprint)
+            ->setManufacturer($manufacturer2)
+            ->setPartUnit($unit);
+
+        $merged = $this->merger->merge($part1, $part2);
+        $this->assertSame($merged, $part1);
+        $this->assertSame($category, $merged->getCategory());
+        $this->assertSame($footprint, $merged->getFootprint());
+        $this->assertSame($manufacturer1, $merged->getManufacturer());
+        $this->assertSame($unit, $merged->getPartUnit());
+    }
+
+    public function testMergeOfTags(): void
+    {
+        $part1 = (new Part())
+            ->setTags('tag1,tag2,tag3');
+
+        $part2 = (new Part())
+            ->setTags('tag2,tag3,tag4');
+
+        $merged = $this->merger->merge($part1, $part2);
+        $this->assertSame($merged, $part1);
+        $this->assertSame('tag1,tag2,tag3,tag4', $merged->getTags());
+    }
+
+    public function testMergeOfBoolFields(): void
+    {
+        $part1 = (new Part())
+            ->setFavorite(false)
+            ->setNeedsReview(true);
+
+        $part2 = (new Part())
+            ->setFavorite(true)
+            ->setNeedsReview(false);
+
+        $merged = $this->merger->merge($part1, $part2);
+        //Favorite and needs review should be true, as it is true in one of the parts
+        $this->assertTrue($merged->isFavorite());
+        $this->assertTrue($merged->isNeedsReview());
+    }
+
     /**
      * This test also functions as test for EntityMergerHelperTrait::mergeCollections() so its pretty long.
      * @return void
      */
-    public function testMergePartLots()
+    public function testMergeOfPartLots(): void
     {
         $lot1 = (new PartLot())->setAmount(2)->setNeedsRefill(true);
         $lot2 = (new PartLot())->setInstockUnknown(true)->setVendorBarcode('test');