diff --git a/PluralKit.Core/Services/PostgresDataStore.cs b/PluralKit.Core/Services/PostgresDataStore.cs
index 7c5a2b04..b3cb12ec 100644
--- a/PluralKit.Core/Services/PostgresDataStore.cs
+++ b/PluralKit.Core/Services/PostgresDataStore.cs
@@ -298,7 +298,8 @@ namespace PluralKit.Core {
         }
         public async Task AddMessage(ulong senderId, ulong messageId, ulong guildId, ulong channelId, ulong originalMessage, PKMember member) {
             using (var conn = await _conn.Obtain())
-                await conn.ExecuteAsync("insert into messages(mid, guild, channel, member, sender, original_mid) values(@MessageId, @GuildId, @ChannelId, @MemberId, @SenderId, @OriginalMid)", new {
+                // "on conflict do nothing" in the (pretty rare) case of duplicate events coming in from Discord, which would lead to a DB error before
+                await conn.ExecuteAsync("insert into messages(mid, guild, channel, member, sender, original_mid) values(@MessageId, @GuildId, @ChannelId, @MemberId, @SenderId, @OriginalMid) on conflict do nothing", new {
                     MessageId = messageId,
                     GuildId = guildId,
                     ChannelId = channelId,