Fix conflict error when tagging from Discord

src/discord/rest.go

@@ -400,7 +400,6 @@ func RemoveGuildMemberRole(ctx context.Context, userID, roleID string) error {
 	const name = "Remove Guild Member Role"
 
 	path := fmt.Sprintf("/guilds/%s/members/%s/roles/%s", config.Config.Discord.GuildID, userID, roleID)
-	logging.ExtractLogger(ctx).Warn().Str("path", path).Msg("I dunno")
 	res, err := doWithRateLimiting(ctx, name, func(ctx context.Context) *http.Request {
 		return makeRequest(ctx, http.MethodDelete, path, nil)
 	})

src/discord/showcase.go

@@ -742,7 +742,15 @@ func updateSnippetTags(ctx context.Context, dbConn db.ConnOrTx, userID string, s
 	}
 
 	for _, tagID := range tagIDs {
-		_, err = tx.Exec(ctx, `INSERT INTO snippet_tags (snippet_id, tag_id) VALUES ($1, $2)`, snippet.ID, tagID)
+		_, err = tx.Exec(ctx,
+			`
+			INSERT INTO snippet_tags (snippet_id, tag_id)
+			VALUES ($1, $2)
+			ON CONFLICT DO NOTHING
+			`,
+			snippet.ID,
+			tagID,
+		)
 		if err != nil {
 			return oops.New(err, "failed to add tag to snippet")
 		}