PPM selections for InfoProvider '&1': Buffer is locked

What causes this issue?

To use PPM selections, an area is required in the shared objects memory.
You need to recreate this area for InfoProvider '&V1&'. However, the
area already exists and is currently locked.

System Response

The buffer cannot be created for the PPM selections.

How to fix this error?

Notify the system administrator.

Procedure for System Administrators

In PPM Customizing, delete the PPM buffer for InfoProvider '&V1&'. In
transaction SHMA, you can also delete the buffer directly for an
individual server. For the SHM area CL_RSPLPPM_DS_AREA, you can display
the instances. Delete the instance with name '&V1&'.

Error message extract from SAP system. Copyright SAP SE.