enum (NoYes) type has wrong value

Hello.

I am setting on code value of MyTable::MyColumn, like that:

MyTable::MyColumn is enum type (NoYes) value = NoYes::Yes;

After setting that value to "Yes", it is sometimes not = 1 (NoYes::Yes), but just a random value (like 12342344 - not =1 on DB).

I put that value by direct sql code in AX (but always put = 1).

What may be the reason that column get sometimes random value (generally it's = 1, but for some reasons I don't understand it's not).

Thanks :)