Limitations of Content Types

The UID of a content type can have a maximum of 200 characters.
The UID accepts only alphanumeric characters and underscores.
The description of a content type can have a maximum of 255 characters.
You can add up to 500 fields in a content type schema.
The Title field and the Display Name property can each have up to 200 characters.
While you can compare, you cannot restore or apply an older schema version directly.
Contentstack automatically numbers versions sequentially. You cannot rename, merge, or manually manage version numbers.
Version comparison doesn’t show how schema changes affect entries across environments (e.g., breaking changes or validations that may fail in certain locales).
Changes to the order of fields are not tracked in version comparisons.
The content type editor does not show which schema version you are viewing.

More articles in "More about Content Types"