I currently have a released managed package with a custom object that has a Text field of length 10. Can I increase this length in a future release of the package, and if so, are there are any impacts to existing records for that object?
2 Answers
The documentation says field length is developer editable and confirms its not locked .So you can definitely increase the length .Increasing the length will have no impact
According to the ISVForce Guide, the following changes can be made to custom fields after a package is released: