While assigning GTIN, we are getting error "Check digit for the GTIN is not correct. (EGP-2775281)"

Summary:

While assigning GTIN, we are getting error "Check digit for the GTIN is not correct. (EGP-2775281)"
How can we remove Check digit validation for GTIN Field

Content (please ensure you mask any confidential information):

In Saudi
In Some case, Drugs that are not registered for use in Saudi Arabia, May be approved by the SFDA for importation and limited use in emergency cases.

So in that case GTIN would be
example case

Unlisted Code - Cosmetic—-99999999999995

Unlisted Code - Chemotherapy——99999999999998

We have Oracle Fusion Purchasing Suite and Oracle Fusion Inventory Management
How can we remove check digit validation from GTIN Field