Migrated from: https://dev.bukkit.org/projects/shopkeepers/issues/388

Originally posted by PhanaticD (Apr 11, 2016):

http://pastebin.com/9NrzqC6Emost likely due to the recent change in serialization for potions

Originally commented by blablubbabc (Apr 11, 2016):

Seems like this might be fixed by a newer commit to spigot: https://hub.spigotmc.org/stash/projects/SPIGOT/repos/craftbukkit/commits/420b983d59aecc1739b11916f60756933302f577
However, if your don't have by chance a backup available, all those potion items which have been invalidly serialized by spigot before they fixed it, might be lost now..

        Edited Apr 11, 2016

Originally closed by blablubbabc (Apr 11, 2016)