fix: Remove missing DocField in fetch_from
diff --git a/erpnext/maintenance/doctype/maintenance_visit_purpose/maintenance_visit_purpose.json b/erpnext/maintenance/doctype/maintenance_visit_purpose/maintenance_visit_purpose.json
index 158f143..ba05355 100644
--- a/erpnext/maintenance/doctype/maintenance_visit_purpose/maintenance_visit_purpose.json
+++ b/erpnext/maintenance/doctype/maintenance_visit_purpose/maintenance_visit_purpose.json
@@ -64,8 +64,6 @@
    "fieldtype": "Section Break"
   },
   {
-   "fetch_from": "prevdoc_detail_docname.sales_person",
-   "fetch_if_empty": 1,
    "fieldname": "service_person",
    "fieldtype": "Link",
    "in_list_view": 1,
@@ -110,13 +108,15 @@
  "idx": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-05-27 17:47:21.474282",
+ "modified": "2023-02-27 11:09:33.114458",
  "modified_by": "Administrator",
  "module": "Maintenance",
  "name": "Maintenance Visit Purpose",
+ "naming_rule": "Random",
  "owner": "Administrator",
  "permissions": [],
  "sort_field": "modified",
  "sort_order": "DESC",
+ "states": [],
  "track_changes": 1
 }
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