LEAP 15.1 MySQL/Mariadb: ERROR 1030 (HY000): Got error 140 "Wrong create options" from storage engine MyISAM

I run a few small databses (to be used in a LAMP environment).

Somewhere in the begin of March I got empty lists in my pages when consulting the database.
It was rather obvious that some update must have done this. Not much time to investigate until now.
Entering mysql as administrator works until I want to extract records from one of the databases:
Looking in the zypper history I found out that on 2020-03-07 mariadb 10.2.31 was installed. Before that on 2020-01-10 version 10.2.29 was installed. I reverted to the 10.2.29 (and then blocked the packages involved: mariadb, mariadb-client, mariadb-errormessages and libmysqld19).

Now everything works fine again, thus I have a by-pass.

Further to the error message. I am not creating a database at al, thus why the "Wrong create options"?
I had such an error earlier when I made a jump from openSUSE 31.1 to 42.x. I then had to make several adaptions to my MySQL scripts and PHP-MySQL interface scripts. One of the things was that I got a similar error because during database creation I had the clauses
These are valid for the MyISAM engine, but invalid for the InnoDB egine. As the default engine was changed in the new version of Mariadb I only had to add
to cure this problem. But in that case it was during creation. and now it isn't!

Before I try to search through web for this problem, I would like to ask if anybody here has an idea.