Unable to lock claim &1

What causes this issue?

A system error is preventing you from being able to lock the
<DS:GLOS.40552E756CE2C94F9C25358499225F19>claim</>.

System Response

You cannot process the claim in change mode at the moment.

How to fix this error?

Switch to display mode, or try to process the claim again later on.

Error message extract from SAP system. Copyright SAP SE.