FB60 tcode is dumping in SFIN at insert/update statement on FAGLFLEXT

The table FAGLFLEXT has been moved from Suite on HANA to SFIN in S/4 HANA. Insert/Update statement is throwing dump in SFIN system. I am aware that this table is converted to a View in SFIN. Please suggest a suitable fix so that FB60 tcode does not dump in S/4 HANA.

CI_FAGLFLEX04 is a custom include in FAGLFLEXT that has custom fields.

Program : SAPLGLIU

Include : LGLIUF0A

Error at : INSERT FAGLFLEXT_BCK FROM FAGLFLEXT.

Best Regards,

Amrita