Error when loading .sk file: numeric ids are not supported anymore.

[MultiDa]

Here is my script thus far:

on damage:
        attacker is holding diamond sword
        strike lightning effect at the victim
        if player in radius of 5 of player is true:
                strike lightning effect at the player

The error message shown in the title pops up when I do /sk reload tests (tests is the name of the file). I don't know any alternatives to numeric IDs, so could someone help? Thanks in advance.

[Sythivo]

use if distance between the attacker and victim is smaller than 5 instead of if player in radius of 5 of player is true

Edited November 14, 2020 by Sythivo

[_Tarna_]

Also in the on damage event, you need to use attacker or victim to specify which person you are talking about in the event. Player won't work. 

[_iZ_]

on damage:
        attacker is holding diamond sword
        strike lightning effect at the victim
        is distance between attacker and player <= 5:
                strike lightning effect at the attacker