diff --git a/includes/models/class-test-run.php b/includes/models/class-test-run.php
index f4ff3c3..85297ff 100644
--- a/includes/models/class-test-run.php
+++ b/includes/models/class-test-run.php
@@ -256,6 +256,23 @@ public static function save( $args = [], $row_id = null ) {
 		}
 	}
 
+	/**
+	 * Delete duplicate test runs by service_test_run_id from database.
+	 *
+	 * @return void
+	 */
+	public static function delete_duplicates() {
+		global $wpdb;
+
+		$test_runs_table = Test_Runs_Table::get_table_name();
+
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching -- It's ok.
+		$wpdb->query(
+			// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- It's ok.
+			"DELETE t1 FROM $test_runs_table t1 INNER JOIN $test_runs_table t2 WHERE t1.id > t2.id AND t1.service_test_run_id = t2.service_test_run_id"
+		);
+	}
+
 	/**
 	 * Insert multiple test data
 	 *
diff --git a/includes/services/class-test-run-service.php b/includes/services/class-test-run-service.php
index 0b35581..8269327 100644
--- a/includes/services/class-test-run-service.php
+++ b/includes/services/class-test-run-service.php
@@ -102,9 +102,11 @@ public function create_test_run( $service_test_run_id, $data, $update = false )
 		if ( $test_run && ! $update ) {
 			return false;
 		}
-		return Test_Run::save(array_merge( $data, [
+		$test_run_id = Test_Run::save(array_merge( $data, [
 			'service_test_run_id' => $service_test_run_id,
 		]), $test_run->id ?? null);
+		Test_Run::delete_duplicates();
+		return $test_run_id;
 	}
 
 	/**