FIM Service SQL Exception - Procedure UpdateResource

Hi,

We are getting following exception when multiple workflows are trying to modify the same single valued attribute on the same object. 

System.Data.SqlClient.SqlException: Reraised Error 50000, Level 14, State 1, Procedure ReRaiseException, Line 37, Message: Reraised Error 50000, Level 14, State 1, Procedure ReRaiseException, Line 37, Message: Reraised Error 2601, Level 14, State 1, Procedure UpdateResource, Line 575, Message: Cannot insert duplicate key row in object 'fim.ObjectValueString' with unique index 'IX_ObjectValueString_ObjectKey_AttributeKey_LocaleKey-Filtered_Multivalued'. The duplicate key value is (179755, 32507, 127).

is there any workaround available to resolve this issue? Appreciate your help. Thanks!