Best way to purge old bytearrays?

We want to purge old byterrays aka bytearrays that are linked to history file variables.
What is the best way to do this ?

  • delete the ACT_HI_VARINST + ACT_GE_BYTEARRAY entries ?
  • delete the ACT_GE_BYTEARRAY entry + clear the BYTEARRAY_ID_ field in ACT_HI_VARINST ?
  • clear the BYTES_ field in ACT_GE_BYTEARRAY ?