When complete to move the Opmanager DE central server other server happen error

When complete to move the Opmanager DE central server other server happen error

Hi,
I have done that move central server to a new windows server. I create a new probe server, install probe server,but the probe server cannot start. The error message in the wrapper.log is:
Central build number 7501 is not compatible with Probe build number 7500. Hence shutting down the probe.

How to solve the problem?  The exist probe server is OK.

Caijun