BPC NW Journal Posting Issue

Dear Experts,

I have created Journal Entry Template with header Information Category,Group Time.

I have entered one Journal Entry and saved it.

While Posting the same, I am getting the error as follows

Failed Reason:

Write-back failed

Write-back failed

Some records did not pass checks; security, work status, etc.

Member () of dimension (GROUPS) is not a valid member

Member () of dimension (GROUPS) is not a valid member

Here in Group Dimension I have created Member as LC and USD.

What could be the issue of such, How to Resolve this error.

Thanks in Advance