Support

TL;DR: There is no need to worry. This is a cosmetic Joomla! issue. There is nothing anyone can do about it.

For more detail, read on.

Whenever a Joomla! extension's developer updates the structure of the database table of their extension they provide an update SQL file. This file has special SQL code called DDL (Data Definition Language) statements. These are executed when you update the extension and modify the database structure.

This part already ran on update, therefore your database structure is fine.

Joomla! also tries to be “smart” about it, in the sense that that it will try to understand the DDL statements' intent and check the database to figure out if its structure matches the intent it has detected.

Unfortunately, Joomla took the computationally cheap but otherwise problematic approach of using regular expressions to parse DDL statements instead of the correct way of using a parser and lexer (that's the only reliable way a programming language like SQL can be parsed). The result is that we often have a disparity between what the SQL code is meant to do and what Joomla! understands. This disparity leads to misleading errors, like the one you are experiencing.

There is no functional problem here. To the contrary, if we remove the update code we will clear the misleading Joomla database warning, sure, but that would cause a functional error to anyone updating from an earlier version.