How To Fix TR588 - Key entry not possible with specified function

SAP Error Message - Details

• Message type: E = Error

• Message class: TR - Change and Transport System

• Message number: 588

• Message text: Key entry not possible with specified function

What causes this issue?

You cannot insert the keys in the request/task because the entry in the
field <LS>Function</> is not one of the following values:
" " (Normal case)
<LB>D</>(elete)
<LB>I</>(nsert)

System Response

The function terminates.

How to fix this error?

You cannot fill the field <LS>Function</> manually. Contact the
application where the error occurred.

Error message extract from SAP system. Copyright SAP SE.