Can't download add-ons that i have bought on the ps5 version on the ps4 version

i bought add-ons on minecraft playstation 5 version and i made a world with them but when my friend tried to join it told him that the world was no longer being hosted. we had previously made worlds with add-ons that i had gotten on my ps4 version and they worked perfectly. i then tried to download the add-ons that i had bought on my ps4 version but it keeps telling me that the download failed. could you please fix this?