¿Why id_currency is change to 0 in ps_cart table?

[EasJMan]

Hello Everyone, so, last week i updated Prestashop to 1.7.7.4 and my parent theme "WareHouse" to 4.4.2, and recently i found that in BO > Orders > Shopping Carts i started getting this exception ( Error Price specification not found for currency "") , so i did a little research and debuging code and i found that the solution is simply changing some rows in my ps_cart table where id_currency is equal to 0, and is strange because they were like 5 or 6 rows, no more, my question is: ¿Why is this happening?, ¿so magically presta inserts some rows with id_currency=0?

 

Thanks in advance!