Champagne Papi announced the delay Wednesday, revealing on his Instagram story that his longtime producer, Noah "40" Shebib, became infected with COVID while mixing and mastering the album.

Drake and 21 Savage's project is called "Her Loss" and it was due out this Friday ... but it's going to be the fan's loss, because Drizzy says the collab is being delayed at least a week, with the new release date moved to next Friday, Nov. 4.

Drake and Noah have worked together for years ... but based on Drake's post, it seems like the COVID diagnosis is only a minor bump in the road.

"Her Loss" was only announced a couple days ago ... Drake revealed the album's title and original release date in his new music video for "Jimmy Cooks," a song featuring 21 Savage off Drake's last album, "Honestly, Nevermind."