Inventory management not allowed for material if item category is &

What causes this issue?

Value-based <GL:inventory_management>inventory management</> is defined
in the <GL:material_master_record>material master record</>, but the
<GL:item_category>item category</> does not allow the material to be
included in inventory management.

How to fix this error?

Check your input.
If you have the relevant authorization, you can take a look at the item
category via the Customizing facility:
<DS:SIMG.SIMG_CFMENUOLMEOMH4>Define external representation of item
categories</>

Error message extract from SAP system. Copyright SAP SE.