Four switches are getting MD5 digest checksum mismatch on trunk: Et1/0, etc .
Solution: Force an update. On SW1, create a dummy vlan # and remove it. This gonna cause a trigger update in a vtp network. Or shut the trunk link down and bring it back up.
SW1#show vtp status
New Configuration Revision number will increment.
Now all 4 switches will sync VTP.
#show vtp status
#show vlan brief