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-rw-r--r--django/db/models/fields/related.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index cdb01cadcb..47b479c763 100644
--- a/django/db/models/fields/related.py
+++ b/django/db/models/fields/related.py
@@ -2540,7 +2540,7 @@ class ManyToManyField(RelatedField):
# related_name with one generated from the m2m field name. Django
# still uses backwards relations internally and we need to avoid
# clashes between multiple m2m fields with related_name == '+'.
- self.rel.related_name = "_%s_+" % name
+ self.rel.related_name = "_%s_%s_+" % (cls.__name__.lower(), name)
super(ManyToManyField, self).contribute_to_class(cls, name, **kwargs)