Hi ALL,
I have a big project to update the moodle 1.9.9+ to the latest versions. But I know I have to step by step to upgrade. So any suggestion that what version i have to started to upgrade.
1.9.19, then 2.2, then 2.7, then 3.3
Read the release notes carefully
https://docs.moodle.org/dev/Moodle_2.2_release_notes
https://docs.moodle.org/dev/Moodle_2.7_release_notes
good luck