No provision for JIT delivery schedules for material &

What causes this issue?

If you wish to generate JIT delivery schedules for a material, the
relevant indicator must first be set in the material master record
(Purchasing or MRP view). This indicator is then adopted when the item
is created.

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.