After we created the initial migration for the model with a JSON field that has a default value, all next migrations will attempt to modify the default value to the same one.
Create an entity that has a json field
mikro-orm migration:create
# created first migrationmikro-orm migration:up
# we up migration and not change anythingmikro-orm migration:create
# a new migration was created that changes the default value to the same