It looks like you are trying to assign multi-value data to a field that supports single assign. Check the PDR for this field for the configuration. If it is configured to support single-assign, update the configuration to allow multi-assign.
Thank You RLJI
I know that , but how can i do it. can anyone explain it to me ????
There is an application named Getting Started by which we can make sure that the property is assigned false. so that the Error can be neutralized. For that particular solution you can refer to this Blog
Thanks for you answers