How overwrite the default message of DATA Slice

Hi All ,

I have created a data slice to prevent the previous year data from planning by using customer exit variable.

due to which when i open Planning Application for the previous years  i get the below default message for that.

I want to replace this message by a customized message.

I can do it using customer exit variable but in that case i will have to maintain this customer exit variable in each of the application.

i want to customize  the message displayed by data slices .

Please help.

Regards

Praveen Kumar