diff --git a/CHANGELOG.md b/CHANGELOG.md
index b14d5feb055..98e681e5881 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## 0.5.11
 
+* `Repos`:
+    * `Common`:
+        * Fixes in `WriteOneToManyRepo#add`
+
 ## 0.5.10
 
 * `Versions`
diff --git a/repos/common/src/main/kotlin/dev/inmo/micro_utils/repos/onetomany/OneToManyAndroidRepo.kt b/repos/common/src/main/kotlin/dev/inmo/micro_utils/repos/onetomany/OneToManyAndroidRepo.kt
index 31c7be0ac99..1cc184fc2b4 100644
--- a/repos/common/src/main/kotlin/dev/inmo/micro_utils/repos/onetomany/OneToManyAndroidRepo.kt
+++ b/repos/common/src/main/kotlin/dev/inmo/micro_utils/repos/onetomany/OneToManyAndroidRepo.kt
@@ -55,6 +55,17 @@ class OneToManyAndroidRepo<Key, Value>(
         helper.blockingWritableTransaction {
             for ((k, values) in toAdd) {
                 values.forEach { v ->
+                    val kAsString = k.keyAsString()
+                    val vAsString = v.valueAsString()
+                    val isThere = select(tableName,
+                        null,
+                        "$idColumnName=? AND $valueColumnName=?",
+                        arrayOf(kAsString, vAsString),
+                        limit = limitClause(1)
+                    ).use { it.moveToFirst() }
+                    if (isThere) {
+                        return@forEach
+                    }
                     insert(
                         tableName,
                         null,