Column ... cannot be converted from type 'varchar(20)' to type 'varchar(20)'

Row based replication stopped with

Last_Errno: 1677

Last_Error: Column 23 of table 'HALLEY.ANANCHC' cannot be converted from type 'varchar(20)' to type 'varchar(20)'

unless

slave_type_conversion=ALL_NON_LOSSY

was enabled.

The types in the error message are both `varchar(20)`, and `SHOW CREATE TABLE` output and even `.frm` file contents are exactly the same on master and slave.

There was a BINLOG'...' provided that indeed contained encoded length for the col #23 as 20 (bytes). The actual column on slave has it 60, due to UTF8.