From cups log:

E [19/Jul/2023:14:07:42 +0200] Samsung_Samsung_ML-2525W: Datei
\"/usr/lib/cups/filter/rastertogutenprint.5.2\" nicht verfügbar: No such file
or directory
E [19/Jul/2023:14:07:42 +0200] [Job 49] Unable to start filter
"rastertogutenprint.5.2" - No such file or directory.
E [19/Jul/2023:14:07:42 +0200] [Job 49] Stopping job because the scheduler
could not execute a filter.


From cups config:
<Printer Samsung_Samsung_ML-2525W>
PrinterId 45
UUID urn:uuid:70334a01-d800-39ed-5a4e-5e4f45e9c01f
Info Samsung Samsung ML-2525W
Location
MakeModel Samsung ML-2550 - CUPS+Gutenprint v5.2.15
DeviceURI socket://10.131.0.20
State Idle
StateTime 1689768462
ConfigTime 1689767864
Type 8392724
Accepting Yes
Shared No
JobSheets none none
QuotaPeriod 0
PageLimit 0
KLimit 0
OpPolicy default
ErrorPolicy stop-printer
Attribute marker-colors \#000000
Attribute marker-levels 50
Attribute marker-names Toner S/N:CRUM-11000311613
Attribute marker-types toner
Attribute marker-change-time 1683056782
</Printer>


It seems that the config was not updated breaking the printing driver as the
config was still pointing to gutenprint 5.2.


This should be somehow prevented - eg by not including the version number in
the config or updating the config automatically.