Mandatory information about my setup:

Have I searched the tickets before posting? Yes
Have I searched the forum before posting? Yes
Have I read the documentation before posting (which pages?)? Yes
Joomla! version: latest
PHP version: (unknown)
MySQL version: (unknown)
Matukio version: 3.0.3
Direct link to the page that shows the issue: (unknown)


Description of my issue:

When updating from Matukio 3.0.3 to 5.1.1, is there any change of the database and how big is the chance to loose data?
I would like to run that update, but would like to keep the events (about 200).