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-rw-r--r--archaeological_operations/models.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/archaeological_operations/models.py b/archaeological_operations/models.py
index f5bf540fa..61b815cb4 100644
--- a/archaeological_operations/models.py
+++ b/archaeological_operations/models.py
@@ -1762,7 +1762,7 @@ class Operation(ClosedItem, DocumentItem, BaseHistorizedItem,
if self.operation_code is None:
self.operation_code = self.get_available_operation_code(self.year)
if hasattr(self, 'code_patriarche'):
- self.code_patriarche = self.code_patriarche or None
+ self.code_patriarche = self.code_patriarche or ""
item = super(Operation, self).save(*args, **kwargs)
self.clean_parcel_duplicates()
return item