Some things that CRM needs to be aware of, modifying field types

CRM field type If the change, such as text type to find type, to create a new name is not the same as the original, you must not delete the previous field and then build the same, so if the official system will cause the import, execute SQL failure, remember. You can add 2 to the field name, or other names, without discarding the comment.

1. Also query whether JS uses this field to modify JS

2. See where the view is used

3. Be sure to write a backup SQL table to prevent data loss if you really modified it

Some things that CRM needs to be aware of, modifying field types