Something broke in the code when i decided to update it, reverting back to the old one doesn't help

I wrote a variable here - highlighted in blue. All 16 pumps went to TIMEOUE
(PICTURE 1)

Rebooted the controller to the old version ! Then performed the reset to factory settings! Loaded it again - no change
Maybe I need a certain firmware?

(PICTURE 2)

Do i need to raplece the PLC 750-891 itself?
I downloaded several old versions to the plc going back months, doesn’t help

(PICTURE 3)
wagi io check info

(PICTURE 4)

What do I do?
Everything worked fine before