i search in the doctype but i did not find this field in material request doctype
Installed Apps
ERPNext: v15.34.0 (version-15)
Frappe Framework: v15.40.0 (version-15)
Frappe HR: v15.28.2 (version-15)
ERPNext: v15.34.0 (version-15)
Frappe Framework: v15.40.0 (version-15)
Frappe HR: v15.28.2 (version-15)
Field name is changed so sometimes you have to ignore the doc and check the doctype, what is saying.
I updated the document so check it.
i did not see it because it is readonly before you update the doc it said i could set it but after update the system set it auto
thx @NCP
and i hope to fix the issue for another people understand the doc for self learn