I'd likely stake one or both trunks so they no longer rubbed. If they are tied so that there's a decent gap in between the trunks, a year or so's growth will hold them permanently apart and you can then remove the ties. Another way to do this is with a limb spreader (homemade or commercially supplied).

i want a better pic of the plant ...

i might cut one of the offenders out completely ... and generate a new shoot...

and in a year or two.. cut out the other ugly one ...

i am not sure your 'knot' ... wasnt a side branch that rubbed the other ...

if this was a recent purchase.. i would not be happy with it ... and would talk with the seller ....

where is that sprout coming from behind the right one????

ken