Changing SKU Number Format

Hello,

We're facing problems in sku number.
Whenever we try to import items data from excel sheets, Akaunting only imports data with sku number of this format yyy-yyy-yy-yy-y (those which has a hyphen).

But whenever sku number an items is without hyphen (such as zzxxyyzzxyz), it doesn't import the item and gives this error:

Error: The sku must be a string. Sheet name: items. Line number: 2

Also, if we manually enter the same data, it doesn't give any error at all.

Can we change the format of importing excel sheets with items with sku with no hyphens or anything?
Or is there any other solution?

Hello,

The problem must be something else as I'm able to created/import items with sku without hyphens.

Regards