Remendar means "to mend" or "to fix," often used for repairing clothes or something broken. It's a less common verb in everyday conversation and music, making it stand out.
In this song, the artist uses it metaphorically when he sings, "Cambiar el pasado y remendar ese error" (Change the past and mend that error). He wishes he could go back and fix a past mistake that led to a heartbreak, giving the word a poignant and regretful tone.
Blessd and Ovy On The Drums bring us a track that's all about longing for what you can't have. Our singer is completely smitten, but there's a huge problem: the person he's interested in is already taken! He laments, "Sé que no serás mía jamás" [I know you'll never be mine] and it's clear he met her too late. He sees her "cuello lleno de otras huellas" [neck full of other marks] and it really stings not to be the one with her.
The chorus, "Qué rico fuera / Que se pudiera / Ahí estuviera / Haciendo todo lo que haces con él" [How great it would be / If it were possible / I'd be there / Doing everything you do with him], perfectly captures that desperate wish to switch places with the other person. He's stuck just imagining what it would be like to be with her, even wishing he could "Cambiar el pasado y remendar ese error" [Change the past and fix that mistake]. It's a relatable feeling of regret and wanting to turn back time, all while watching her from afar on Instagram. Talk about a tough spot!