diff --git a/obp-commons/src/main/scala/com/openbankproject/commons/model/CommonModel.scala b/obp-commons/src/main/scala/com/openbankproject/commons/model/CommonModel.scala
index bab5c55a8..06364c000 100644
--- a/obp-commons/src/main/scala/com/openbankproject/commons/model/CommonModel.scala
+++ b/obp-commons/src/main/scala/com/openbankproject/commons/model/CommonModel.scala
@@ -532,7 +532,7 @@ case class ChallengeCommons(
   override val scaMethod: Option[SCA],
   override val scaStatus: Option[SCAStatus],
   override val authenticationMethodId: Option[String] ,
-  override val attemptCounter: Int  = 0
+  override val attemptCounter: Int  = 0 //NOTE: set the default value here, so do not break current connectors
 ) extends ChallengeTrait
 object ChallengeCommons extends Converter[ChallengeTrait, ChallengeCommons]