The text in-place prefix edit problem described in: <http://sandbox.easyeda.com/bbs_view_2048.htm> still occurs after I try to enter a prefix that has already been used in the schematic, even if the number is no longer in the schematic. Example: i) Place two voltage sources `V1` and `V2` in a schematic. ii) Edit `V1' to `V3`. That works OK. iii) Edit `V3' back to `V1`: the Prefix Conflict window pops up and says that the prefix I have chosen already exists. iv) The prefix is now showing `V4`. After that, I can only enter a prefix with a number greater than any I have already entered, even if no device with that prefix number exists in the circuit. It looks like a problem with the list of refoxes entered and used in the schematic. If I edit `V4' to `Vpsu`, and then edit `Vpsu` to `V4` then the Prefix Conflict window pops up and says that the prefix I have chosen already exists and the prefix becomes `V5`. **But** if I then edit `V5' back to `Vpsu`, then that works OK.