When does delta sliggoo evolve

General Discussion
1

In my randomizer save file my delta sliggoo won’t evolve it is level 50 and not holding any items can someone explain? I am on version 1.2.5

2

Changelogs. (Bug Fixes)

“Sliggoo and Delta Sliggoo now correctly require rain in order to evolve.”

3

Try leveling it up on Route 10.

4

thanks