Error Saving Items

ERPNext
1

On ver 11, Master,

Once an item has been created and transactions made on the Item, and if you try to change things like Valuation Rates or try to add a new Unit of Measure, you get the following error. Items have no variants. However Items for which Stock Transactions have not been done don’t have this problem. Am I missing something? Or is this a bug?

Traceback (most recent call last):
File “/home/frappe/frappe-bench/apps/frappe/frappe/desk/form/save.py”, line 22, in savedocs
doc.save()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 260, in save
return self._save(*args, **kwargs)
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 299, in _save
self._validate()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 466, in _validate
self.validate_set_only_once()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 493, in validate_set_only_once
frappe.CannotChangeConstantError)
File “/home/frappe/frappe-bench/apps/frappe/frappe/init.py”, line 352, in throw
msgprint(msg, raise_exception=exc, title=title, indicator=‘red’)
File “/home/frappe/frappe-bench/apps/frappe/frappe/init.py”, line 338, in msgprint
_raise_exception()
File “/home/frappe/frappe-bench/apps/frappe/frappe/init.py”, line 311, in _raise_exception
raise raise_exception(msg)
CannotChangeConstantError: Value cannot be changed for Variant Based On
request.js:321:6
Traceback (most recent call last):
File “/home/frappe/frappe-bench/apps/frappe/frappe/app.py”, line 61, in application
response = frappe.handler.handle()
File “/home/frappe/frappe-bench/apps/frappe/frappe/handler.py”, line 21, in handle
data = execute_cmd(cmd)
File “/home/frappe/frappe-bench/apps/frappe/frappe/handler.py”, line 56, in execute_cmd
return frappe.call(method, **frappe.form_dict)
File “/home/frappe/frappe-bench/apps/frappe/frappe/init.py”, line 1027, in call
return fn(*args, **newargs)
File “/home/frappe/frappe-bench/apps/frappe/frappe/desk/form/save.py”, line 22, in savedocs
doc.save()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 260, in save
return self._save(*args, **kwargs)
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 299, in _save
self._validate()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 466, in _validate
self.validate_set_only_once()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 493, in validate_set_only_once
frappe.CannotChangeConstantError)
File “/home/frappe/frappe-bench/apps/frappe/frappe/init.py”, line 352, in throw
msgprint(msg, raise_exception=exc, title=title, indicator=‘red’)
File “/home/frappe/frappe-bench/apps/frappe/frappe/init.py”, line 338, in msgprint
_raise_exception()
File “/home/frappe/frappe-bench/apps/frappe/frappe/init.py”, line 311, in _raise_exception
raise raise_exception(msg)
CannotChangeConstantError: Value cannot be changed for Variant Based On

Thanks

Jay

2

Same issue here, guys. Cannot change anything, even though variants don’t exist. This seems to have started happening since the last update. I’m currently on ERPNext: v11.1.18 (master)
Frappe Framework: v11.1.18 (master)

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3

This is turning out to be quite critical as we have some transactions on hold because of this issue :frowning: Could anyone suggest a temporary workaround/override to change item settings?

4

I have the same error when editing item and we haven’t variants at all in item list.
I noticed

  • the same item I changed 8 days ago (28.03.2019) and all was Ok, we did not make any changes during this time for this item (and other old items).
  • we have items added 3 days ago, I can change them all without error. But all older items have error - Value cannot be changed for Variant Based On.
5

Any solution abut this?

6

We also need an update on this. This is critical for us as well since we update items all the time. We also have no variants.

7

The latest bench update seems to have fixed this! :raised_hands: