Fixed #34946 -- Preserved db_default on combined default field addition.

Regression in 7414704e88d73dafbcfbb85f9bc54cb6111439d3.

1 files changed, 2 insertions, 2 deletions

diff --git a/django/db/backends/base/schema.py b/django/db/backends/base/schema.py
index 191809441a..ef859907de 100644
--- a/django/db/backends/base/schema.py
+++ b/django/db/backends/base/schema.py
@@ -744,9 +744,9 @@ class BaseDatabaseSchemaEditor:
         }
         self.execute(sql, params)
         # Drop the default if we need to
-        # (Django usually does not use in-database defaults)
         if (
-            not self.skip_default_on_alter(field)
+            field.db_default is NOT_PROVIDED
+            and not self.skip_default_on_alter(field)
             and self.effective_default(field) is not None
         ):
             changes_sql, params = self._alter_column_default_sql(