Temporary quantity assignment could not be saved in liveCache &1

What causes this issue?

The temporary quantity assignment could not be written to liveCache
using the connection &v1&.
The writing of the temporary quantity assignment was terminated with
the error number &v2&.

System Response

Product allocations cannot be carried out.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Check liveCache.

Error message extract from SAP system. Copyright SAP SE.