Error while creating or viewing 'Opportunity'

[omar_cavazos]

I’m having the same issue, just upgraded from v6.27 (with a ton of errors btw).

Also when I click on Supplier Quotation this appears:

Warning: Unable to find prevdoc_docname in any table related to Supplier Quotation

This post also mentions the same problem:

Error while saving new opportunity

Hi Guys, I’m brand new to ERPNext and playing with the system before putting it in production mode for our team. Do you know why we’re getting the below error while trying to save new opportunity? Thank you. App Versions { “erpnext”: “7.1.0-beta”, “frappe”: “7.1.0-beta” } Route Form/Opportunity/OPTY-00002 Error Report Traceback (most recent call last): File “/home/frappe/frappe-bench/apps/frappe/frappe/app.py”, line 55, in application response = frappe.handler.handle() File “/home/f…