What type of bonding do you use? Looking at the error; I guess it is LACP in this case.
Note1:
The Aggregator ID value for each interface in an LACP bond should match. If they do not match the switch ports are likely not configured correctly.
Note 2:
The bond may still operate if the Aggregator IDs do not match, but it will only be utilizing a subset of the bonded interfaces.
Check the switch side, the LACP configuration on the switch side may be causing this. -- *Get help from network teams for that. (It is most likely eth1 is connected to a switchport which is a member of a different switch-side ethernet channel than eth0) --> This is from Redhat byteway.
For your OS side, use the following comands to check the bonding conf;