Can't drop logical replication slot

Hi all,

while trying to setup a new logical replication with a master, which
was a physical replication slave (and is now a master), I get:

operations=# SELECT * FROM pg_replication_slots;
slot_name | plugin | slot_type | datoid | database | temporary | active | active_pid | xmin | catalog_xmin | restart_lsn | confirmed_flush_lsn
------------+----------+-----------+--------+------------+-----------+--------+------------+------+--------------+--------------+---------------------
meteo_ddb4 | pgoutput | logical | 18360 | operations | f | f | | | 180762192 | 2C2/6CB2FB50 | 2C2/6CB2FB88
meteo_ddb5 | pgoutput | logical | 18360 | operations | f | f | | | 180762192 | 2C2/6CB2FB88 | 2C2/6CB2FBC0
(2 rows)

Time: 2,435 ms
operations=# select * from pg_drop_replication_slot('meteo_dbb5');
ERROR: replication slot "meteo_dbb5" does not exist
Time: 1,556 ms
operations=#

How can I fix this?
Subscription on the other end has been dropped.

Any help appreciated,
Axel
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PGP-Key: CDE74120 ☀ computing @ chaos claudius