After trying different approaches to solve this issue, i found that this particular issue is resolved once you change the processing order of "State code" before "GST Vendor Type" and "GST Registration". Refer attached screenshot. To access "Edit - Config. Package Fields" go to Config. Package Card, then fast tab "Tables", then click on "Table" and then "fields". IN the attached screenshot, the processing order of state code earlier was 86 which i changed to 6. After doing it, the error is resolved.
Not very sure about why it worked but my error was resolved.
