1 files changed, 25 insertions, 1 deletions
diff --git a/op_guide/plume/README.md b/op_guide/plume/README.md
index 4a8bbac..16f7af9 100644
--- a/op_guide/plume/README.md
+++ b/op_guide/plume/README.md
@@ -17,4 +17,28 @@ plm users new \
 ```
 
 That's all folks, now you can use your new account at https://plume.deuxfleurs.fr
- 
+
+## Bug and debug
+
+If you can't follow a new user and have this error:
+
+```
+2022-04-23T19:26:12.639285Z  WARN plume::routes::errors: Db(DatabaseError(UniqueViolation, "duplicate key value violates unique constraint \"follows_unique_ap_url\""))
+```
+
+You might have an empty field in your database:
+
+```
+plume=> select * from follows where ap_url='';
+  id  | follower_id | following_id | ap_url
+------+-------------+--------------+--------
+ 2118 |          20 |          238 |
+(1 row)
+```
+
+Simply set the `ap_url` as follows:
+
+```
+plume=> update follows set ap_url='https://plume.deuxfleurs.fr/follows/2118' where id=2118;
+UPDATE 1
+```