awk to get certain next lines when a pattern is matched
09:25 22 Dec 2025

I have an input as the following.

0:4:1 untagged 192.168.20.11 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           10 192.168.10.11 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           30 192.168.30.11 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           40 192.168.40.11 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           50 192.168.50.11 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           60 192.168.60.11 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           70 192.168.70.11 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           80 192.168.80.11 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           90 192.168.90.11 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
0:4:2 untagged 192.168.20.12 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
1:4:1 untagged 192.168.20.13 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           10 192.168.10.13 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           30 192.168.30.13 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           40 192.168.40.13 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           50 192.168.50.13 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           60 192.168.60.13 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           70 192.168.70.13 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           80 192.168.80.13 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
-           90 192.168.90.13 255.255.255.0     0.0.0.0 0 0.0.0.0        3205
1:4:2 untagged 192.168.20.14 255.255.255.0     0.0.0.0 0 0.0.0.0        3205

I want to get the lines which starts with a dash but I want to swap the $1 of "untagged" lines with the dashes but I don't want the untagged lines in the output..

I tried lots of things with next but failed.

such as:

 | awk '{if ($2 == "untagged") saved=$1; next;} {if ($1 == "-"); $1=saved; print $1, $2}' 

0:4:1   10 
0:4:1   30 
0:4:1   40 
0:4:1   50 
0:4:1   60 
0:4:1   70 
0:4:1   80 
0:4:1   90 
1:4:1   10
1:4:1   30 
1:4:1   40
1:4:1   50 
1:4:1   60 
1:4:1   70 
1:4:1   80 
1:4:1   90

Appreciate your help, have struggled to solve this.. I thought about "getline" but there could be 2-9 lines which starts with dashes after untagged pattern seen..

awk