Backflush not possible when bulk material indicator is set

What causes this issue?

You have set the indicator for
<DS:GLOS.3526C4BDAFAB52B9E10000009B38F974>bulk material</> in the
material master record. At the same time, the material is planned for
backflushing.
A material component that is labeled as a bulk material is directly
available at the <GL:work_center>work center</>. Therefore, no goods
withdrawal can take place for bulk material.

System Response

The backflushing of material where the bulk material indicator has been
set is not allowed in either the task list or the order.

How to fix this error?

Undo either the indicator for bulk material or backflushing in the
material master record.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.