Code must be digit issue.

[yuxxeun]

I was build an system inventory management, and then there's column in the dataabse that named kode which using string type (i.e: MT-00001), with that kode, i got error like this one:

And then i was trying to change the kode to full number like 0001 and suprisingly its works!
Is there solution for this issue? because i want to still using MT kode for stuff like monitoring, PR to printer, and etc.

[micraux]

Which format are you using?

Seems the one you are using accepts only numeric values...