Ensure that Backup and Restore should work on shared servers as some cases were failing due to initial changes.

Fixes #6385

web/migrations/versions/c6974f64df08_.py

@@ -0,0 +1,28 @@
+
+"""empty message
+
+Revision ID: c6974f64df08
+Revises: a39bd015b644
+Create Date: 2021-04-22 10:06:21.282770
+
+"""
+from pgadmin.model import db
+
+
+
+# revision identifiers, used by Alembic.
+revision = 'c6974f64df08'
+down_revision = 'a39bd015b644'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    db.engine.execute(
+        'ALTER TABLE sharedserver ADD COLUMN osid INTEGER'
+    )
+
+
+def downgrade():
+    # pgAdmin only upgrades, downgrade not implemented.
+    pass