All of test classes have code coverage more than 90% in lower environment but when our admin move all test classes and apex class to Production.It display warning message mentioned in heading and also display below message:
Reported Changes:
- Apex Class was Changed.
- Test Class was Changed.
- Existing Field was Changed.
- Trigger Changed.
Can someone suggest me why it is causing? Our admin use Snapshot to migrate all changes from lower environment to Production.