Re: Q: error on updating collation version information

Is this to be expected ?

PG 15.1 on Debian:

gnumed_v22=# select *, pg_collation_actual_version(oid), pg_encoding_to_char(collencoding) from pg_collation where collname = 'zh_TW';
-[ RECORD 1 ]---------------+------------
oid | 12985
collname | zh_TW
collnamespace | 11
collowner | 10
collprovider | c
collisdeterministic | t
collencoding | 4
collcollate | zh_TW.euctw
collctype | zh_TW.euctw
colliculocale |
collversion | 2.35
pg_collation_actual_version | 2.36
pg_encoding_to_char | EUC_TW
-[ RECORD 2 ]---------------+------------
oid | 12986
collname | zh_TW
collnamespace | 11
collowner | 10
collprovider | c
collisdeterministic | t
collencoding | 6
collcollate | zh_TW.utf8
collctype | zh_TW.utf8
colliculocale |
collversion | 2.36
pg_collation_actual_version | 2.36
pg_encoding_to_char | UTF8

gnumed_v22=# begin;
BEGIN
gnumed_v22=*# alter collation pg_catalog."zh_TW" refresh version ;
NOTICE: version has not changed
ALTER COLLATION
gnumed_v22=*# alter collation pg_catalog."zh_TW.utf8" refresh version ;
NOTICE: version has not changed
ALTER COLLATION
gnumed_v22=*# alter collation pg_catalog."zh_TW.euctw" refresh version ;
ERROR: collation "pg_catalog.zh_TW.euctw" for encoding "UTF8" does not exist
gnumed_v22=!#

As far as I can tell the documentation asserts that since the
database encoding is UTF8 the pg_catalog."zh_TW.euctw" will
be ignored by the server for all practical purposes.

Does this mean it is impossible to "correct" its version
information ?

And if so, that is expected to be non-harmful and is not
expected to trigger nag messages ?

Thanks,
Karsten
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GPG 40BE 5B0E C98E 1713 AFA6 5BC0 3BEA AC80 7D4F C89B