Route to <to-ISP3-Converge> not added bad prefix

RouterOS Beginner Basics
1

hope someone can enlighten me whats the cause of this error. I just notice this when i check the logs today.

pppoe,ppp error → route is not added bad prefix

here is the IP Routes and IP/FIREWALL MANGLE

IP ROUTES

Flags: D - DYNAMIC; X - DISABLED, I - INACTIVE, A - ACTIVE; c - CONNECT, s - STATIC; + - ECMP
Columns: DST-ADDRESS, GATEWAY, ROUTING-TABLE, DISTANCE
 #      DST-ADDRESS        GATEWAY              ROUTING-TABLE     DISTANCE
;;; PBR ISP 1
 0  Xs  0.0.0.0/0          192.168.1.1          to-ISP1-PLDT             1
;;; ISP PLDT (main)
 1  Xs  0.0.0.0/0          192.168.1.1          main                     2
;;; ISP3-CONVERGE(main)
 2  Xs  0.0.0.0/0          192.168.100.1        main                     1
;;; Main Route ISP1
 3  As+ 0.0.0.0/0          8.8.4.4              main                     1
;;; Main Route ISP2 
 4   s  0.0.0.0/0          8.8.8.8              main                     2
;;; Check Gateway ISP1
 5  As+ 0.0.0.0/0          208.67.222.222       main                     1
;;; Check Gateway ISP2
 6   s  0.0.0.0/0          208.67.220.220       main                     2
;;; Recursive Check DNS ISP1
 7  As  8.8.4.4/32         192.168.1.1          main                     1
;;; Recursive Check DNS Isp 2
 8  As  8.8.8.8/32         192.168.100.1        main                     1
  
;;; More Detection ISP2
 9  As  208.67.220.220/32  192.168.100.1        main                     1
;;; More Detection ISP1
10  As  208.67.222.222/32  192.168.1.1          main                     1
;;; BackUpRoute ISP1
11  As  0.0.0.0/0          8.8.8.8              to-ISP1-PLDT             2
;;; BackUpRoute ISP2
12  As  0.0.0.0/0          8.8.4.4              to-ISP3-Converge         2


FIREWALL MANGLE



Flags: X - disabled, I - invalid; D - dynamic 
 0    ;;; PBR to ISP1
      chain=prerouting action=mark-routing new-routing-mark=to-ISP1-PLDT passthrough=no src-address-list=to-ISP1-PLDT dst-address-list=!PrivateIP in-interface=LAN-ETH5 
      log=no log-prefix="" 

 1    ;;; PBR to ISP2
      chain=prerouting action=mark-routing new-routing-mark=to-ISP3-Converge passthrough=no src-address-list=to-ISP3-CONVERGE dst-address-list=!PrivateIP 
      in-interface=LAN-ETH5 log=no log-prefix="" 

 2    ;;; Web(Http + Https)
      chain=prerouting action=mark-connection new-connection-mark=Web_Conn passthrough=yes protocol=tcp dst-port=80,443 log=no log-prefix="" 

 3    chain=prerouting action=mark-connection new-connection-mark=Web_Conn passthrough=yes protocol=udp dst-port=80,443 log=no log-prefix="" 

 4    chain=prerouting action=mark-packet new-packet-mark=Web_Up passthrough=no connection-mark=Web_Conn in-interface=LAN-ETH5 log=no log-prefix="" 

 5    chain=prerouting action=mark-packet new-packet-mark=Web_Up passthrough=no connection-mark=Web_Conn routing-mark=to-ISP2-Globe in-interface=bridge-LAN log=no 
      log-prefix="" 

 6    chain=prerouting action=mark-packet new-packet-mark=Web_Down passthrough=no connection-mark=Web_Conn in-interface-list=WAN-LIST log=no log-prefix="" 

 7    ;;; IPTV GLOBAL
      chain=prerouting action=mark-connection new-connection-mark=IPTV_Con passthrough=yes protocol=udp dst-port=8554,9874,5001,5002,5003 log=no log-prefix="" 

 8    ;;; IPTV MARKPACKET
      chain=prerouting action=mark-packet new-packet-mark=IPTV-PCKT passthrough=no protocol=udp connection-mark=IPTV_Con in-interface=LAN-ETH5 log=no log-prefix="" 

 9    chain=prerouting action=mark-packet new-packet-mark=IPTV-PCKT passthrough=no protocol=udp connection-mark=IPTV_Con in-interface=bridge-LAN log=no log-prefix="" 

10    ;;; ICMP 
      chain=prerouting action=mark-connection new-connection-mark=ICMP_Conn passthrough=yes protocol=icmp log=no log-prefix="" 

11    chain=prerouting action=mark-packet new-packet-mark=ICMP_Up passthrough=no connection-mark=ICMP_Conn in-interface=LAN-ETH5 log=no log-prefix="" 

12    chain=prerouting action=mark-packet new-packet-mark=ICMP_Up passthrough=no connection-mark=ICMP_Conn in-interface=bridge-LAN log=no log-prefix="" 

13    chain=prerouting action=mark-connection new-connection-mark=ICMP_Down passthrough=no connection-mark=ICMP_Conn in-interface-list=WAN-LIST log=no log-prefix="" 

14    ;;; DNS
      chain=prerouting action=mark-connection new-connection-mark=DNS_Conn passthrough=yes protocol=tcp dst-port=53 log=no log-prefix="" 

15    chain=prerouting action=mark-connection new-connection-mark=DNS_Conn passthrough=yes protocol=udp dst-port=53 log=no log-prefix="" 

16    chain=prerouting action=mark-packet new-packet-mark=DNS_Up passthrough=no connection-mark=DNS_Conn in-interface=bridge-LAN log=no log-prefix="" 

17    chain=prerouting action=mark-packet new-packet-mark=DNS_Up passthrough=no connection-mark=DNS_Conn in-interface=LAN-ETH5 log=no log-prefix="" 

18    chain=prerouting action=mark-packet new-packet-mark=DNS_Down passthrough=no connection-mark=DNS_Conn in-interface-list=WAN-LIST log=no log-prefix="" 

19    ;;; VOIP / ZOOM
      chain=forward action=mark-packet new-packet-mark=voip passthrough=yes protocol=udp packet-mark=voip dst-port=3478-3481 log=no log-prefix="" 

20 X  ;;; CONVERGE
      chain=prerouting action=mark-routing new-routing-mark=to-ISP3-Converge passthrough=no src-address-list=to-ISP3-CONVERGE log=no log-prefix="" 

21    ;;; No Balance Traffic entry on PPPoE
      chain=prerouting action=accept src-address-list=PPPoE_List dst-address-list=PPPoE_List log=no log-prefix="" 

22    ;;; Access to ISP Routers
      chain=prerouting action=accept dst-address-list=WAN_LIST log=no log-prefix="" 

23    ;;; Input
      chain=input action=mark-connection new-connection-mark=ISP1_Conn passthrough=yes in-interface=ISP1-PLDT log=no log-prefix="" 

24    chain=input action=mark-connection new-connection-mark=ISP2_Conn passthrough=yes in-interface=ISP3-ETH7 log=no log-prefix="" 

25    ;;; Connection Mark to ISP
      chain=prerouting action=mark-connection new-connection-mark=ISP1_Conn passthrough=yes connection-mark=no-mark in-interface=ISP1-PLDT log=no log-prefix="" 

26    chain=prerouting action=mark-connection new-connection-mark=ISP2_Conn passthrough=yes connection-mark=no-mark in-interface=ISP3-ETH7 log=no log-prefix="" 

27    ;;; Output
      chain=output action=mark-routing new-routing-mark=to-ISP1-PLDT passthrough=no connection-mark=ISP1_Conn log=no log-prefix="" 

28    chain=output action=mark-routing new-routing-mark=to-ISP3-Converge passthrough=no connection-mark=ISP2_Conn log=no log-prefix="" 

29    ;;; PCC
      chain=prerouting action=mark-connection new-connection-mark=ISP1_Conn passthrough=yes dst-address-type=!local connection-mark=no-mark in-interface=LAN-ETH5 
      per-connection-classifier=both-addresses-and-ports:2/0 log=no log-prefix="" 

30    chain=prerouting action=mark-connection new-connection-mark=ISP2_Conn passthrough=yes dst-address-type=!local connection-mark=no-mark in-interface=LAN-ETH5 
      per-connection-classifier=both-addresses-and-ports:2/1 log=no log-prefix="" 

31    ;;; Routing Mark
      chain=prerouting action=mark-routing new-routing-mark=to-ISP1-PLDT passthrough=no connection-mark=ISP1_Conn in-interface=LAN-ETH5 log=no log-prefix="" 

32    chain=prerouting action=mark-routing new-routing-mark=to-ISP3-Converge passthrough=no connection-mark=ISP2_Conn in-interface=LAN-ETH5 log=no log-prefix=""

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2

Well, its not a beginner question at this point, but to answer your question I would have to
a. understand the requirements ( not articulated and would take several paragraphs of detailed needs of all user and devices including the admin )
b. understand your network design (not articulated, no diagram provided )
c. see the config as parts of are useless without the whole (not provided) and moreover to see the multitude of errors in the config, or the extra stuff added, not needed that may be interfering.

++++++++++++++++++++++++++++
Some here will be able to make educated guesses based on your limited input, so please be patient.

3

When you run out of gas, do you check if your tires are inflated?

It's clearly written, nothing to invent:
The PPPoE server sends a route that the router doesn't correctly understand, or is wrong at the start.
More detailed logging is needed, ask your ISP for why provide one route with bad prefix.