As dataminer Tez2 noted, the Rockstar Games website re-uploaded the old Red Dead Redemption logo and added Red Dead Redemption (Rockstar Presents Ver) to the list of games, codenamed RDR1RSP.
Probably RDR1RSP stands for Red Dead Redemption Rockstar Presents or Red Dead Redemption Remaster Single-player. If the latter is correct, then the potential remaster will likely be released without multiplayer.
Note that nothing points directly to the re-release, in contrast to the leak of logos before the announcement of Grand Theft Auto: The Trilogy – The Definitive Edition. Perhaps the company is just updating the catalog so that all games are displayed under the Rockstar Games Presents brand.
Recall that rumors of a Red Dead Redemption remaster have been circulating for a long time. Recently, the game received an age rating again in South Korea. According to former IGN editor Colin Moriarty (Colin Moriarty), the updated western really exists – it can be announced in August.