& requisition(s) not changed due to lack of authorization

What causes this issue?

You have attempted to change a purchase requisition from within a list
display. However, you are not authorized to make this change.

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

System Response

How to fix this error?

If you need the authorization to make changes, contact your system
administrator.

Error message extract from SAP system. Copyright SAP SE.