You want to change the profit center but product stock still exists

What causes this issue?

You want to change the profit center in the product master record.
However, changing the profit center could lead to inconsistencies in FI
because stock data already exists for this product.
Examples:
Stock data already exists for a product and was posted with profit
center 'A' according to the current assignment in FI. If you change the
profit center in the product master (for example, to 'B') and the
current stock is consumed, none of the old stock would be used up in FI
(with profit center 'A'), and there would be a negative product stock
posted on the new account assignment (profit center 'B').
If there are price differences for the product on profit center 'A' and
these are only offset in FI after the profit center was changed and were
therefore offset against profit center 'B', this causes more problems.

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

System Response

The action is terminated.

How to fix this error?

Procedure for System Administrators

If you want to enable the profit center to be changed, proceed as
follows:
Determine the potential effects of a profit center change on the
corresponding balance sheet in FI.
You can change this message from an error message to a warning. Do this
in the IMG activity Define Attributes of System Messages (work area MM,
message number 335).

Error message extract from SAP system. Copyright SAP SE.