mysql  Ver 15.1 Distrib 10.5.8-MariaDB, for debian-linux-gnu (x86_64) using  EditLine wrapper

GnuCash 4.4
Build ID: 4.4+(2020-12-28)

Error message from GnuCash:
An error occurred while processing mysql://gord@localhost/gnucash.

- I have an XML database loaded into GnuCash.
- I try to save the database as mysql (MariaDB) in the same machine running debian linux (I get the same error message if I try to save the database from a windows machine to the MariaDB on the debian machine)
-- File -> Save As... Then select mysql as the Data Format. Then enter the Username and Password required for the database.
-- GnuCash thinks for a while then gives me the error message in a popup window 


It appears that mysql (or somewhere in the backend of gnuCash) does not like a back slash character as the last character in a field. The data I was trying to save had one entry with a 'notes' field that had a backslash as the last character. The text was "2 books one for A one for\". It appears when I save this as an XML file there is no problem but if I try to save this as a mysql I get an error message. A backslash other than at the end of the field does not appear to cause a problem.
BTW if I remove the backslash and successfully save to a mysql file and then go back into the register GnuCash will not let me add a backslash to a field. However, if I save it as an XML file the backslash is allowed.

Here are the relevant lines from the 'gnucash.trace' file:

* 09:09:43 ERROR <gnc.backend.dbi> [error_handler()] DBI error: 1064: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '1970-01-01 00:00:00',0,1)' at line 1
* 09:09:43 ERROR <gnc.backend.dbi> [GncDbiSqlConnection::execute_nonselect_statement()] Error executing SQL INSERT INTO slots(obj_guid,name,slot_type,int64_val,string_val,timespec_val,numeric_val_num,numeric_val_denom) VALUES('c4f3c08454534822a2ff8cbb662b44cf','notes',4,0,'2 books one for A one for\','1970-01-01 00:00:00',0,1)
* 09:09:43 ERROR <gnc.backend.sql> [GncSqlBackend::execute_nonselect_statement()] SQL error: INSERT INTO slots(obj_guid,name,slot_type,int64_val,string_val,timespec_val,numeric_val_num,numeric_val_denom) VALUES('c4f3c08454534822a2ff8cbb662b44cf','notes',4,0,'2 books one for A one for\','1970-01-01 00:00:00',0,1)
* 09:09:43 ERROR <gnc.backend.sql> [GncSqlTransBackend::commit()] Transaction Chapters dated 2011-02-21 in account Gifts not saved due to Slots save failed. Check trace log for SQL errors.