There is not enough space for this row

I have create a Report on Power BI desktop  and connected to MySQL data base. After that i published to my power bi online. I then try to Refresh the Dataset and am getting an error "There is no enough space for this row" (that is the processsing Error).

I edited my credentials to put the right credentials for the MySQL database. Also i have about 50 tables in this dataset (most of them have small amount of rows). But i was wondering if theres is a limit?

There might be about 30k rows if you add up all the tables.

Thanks