correctly merge db migrations with origin master (coreos)

capsulflask/schema_migrations/13_down_coreos.sql

@@ -0,0 +1,3 @@
+DELETE FROM os_images WHERE id = 'coreos';
+
+UPDATE schemaversion SET version = 12;

capsulflask/schema_migrations/13_up_coreos.sql

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+INSERT INTO os_images (id, template_image_file_name, description, deprecated)
+VALUES  ('coreos', 'coreos/stable/root.img.qcow2', 'Fedora CoreOS Stable', FALSE);
+
+UPDATE schemaversion SET version = 13;

capsulflask/schema_migrations/14_down_coreos_notready.sql

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+UPDATE os_images SET deprecated = FALSE WHERE id =  'coreos';
+
+UPDATE schemaversion SET version = 13;

capsulflask/schema_migrations/14_up_cores_notready.sql

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+UPDATE os_images SET deprecated = TRUE WHERE id =  'coreos';
+
+UPDATE schemaversion SET version = 14;