I learnt a song & was asked to sing it most weeks for 2/3 years - I even recorded it as my version seemed to be popular locally.

I dropped out of singing for a decade.

When I returned to performing I found that a local singer had taken it as 'his' song & got quite sulky if anyone else sang it.
Regulars kept calling out for me to sing it but I refused on the grounds of courtesy knowing he didn't have a large selection of material.
As he didn't appear one night & I was asked, I sang it.
Someone jokingly mentioned to him that I had performed it & he asked me why I thought I had the 'right' to do 'his' song 'cos he'd been singing it for the last couple of years.
I said 'Cause I recorded it 15yrs ago!
I try to be courteous but sometimes it can backfire.
Another singer sang a song I was known for & a friend said 'He's singing your song'.
I said, 'No he isn't - he's singing a Johnny Cash song!'

Songs are written to be sung - so sing 'em!