Just a heads up for anyone looking up how to override inherited DOREPLIFETIME() variables, you now have to use one of the following.
RESET_REPLIFETIME()
RESET_REPLIFETIME_CONDITION()
RESET_REPLIFETIME_FAST()
RESET_REPLIFETIME_CONDITION_FAST()
RESET_REPLIFETIME_FAST_STATIC_ARRAY()
RESET_REPLIFETIME_WITH_PARAMS()
The rest of the potential overrides (Resets) can be found at line 453 in UnrealNetwork.h as of 5.4.2