diff --git a/app/features/scrims/core/Scrim.ts b/app/features/scrims/core/Scrim.ts
index 0235c508e..853293ce6 100644
--- a/app/features/scrims/core/Scrim.ts
+++ b/app/features/scrims/core/Scrim.ts
@@ -21,7 +21,7 @@ export function isParticipating(post: ScrimPost, userId: number) {
 }
 
 export function resolvePoolCode(postId: number) {
-	return `SC${postId % 10}`;
+	return `SC${(postId % 9) + 1}`;
 }
 
 /**
diff --git a/app/features/tournament-bracket/core/Tournament.ts b/app/features/tournament-bracket/core/Tournament.ts
index f71281602..d81056417 100644
--- a/app/features/tournament-bracket/core/Tournament.ts
+++ b/app/features/tournament-bracket/core/Tournament.ts
@@ -675,12 +675,17 @@ export class Tournament {
 
 		// for small tournaments there should be no risk that the pool gets full
 		// so to make it more convenient just use same suffix every match
-		const globalSuffix = this.ctx.teams.length <= 20 ? this.ctx.id % 10 : null;
+		// pool numbers are kept in the 1-9 range (0 is not used)
+		const globalSuffix =
+			this.ctx.teams.length <= 20 ? (this.ctx.id % 9) + 1 : null;
 
 		return {
 			prefix,
 			suffix:
-				globalSuffix ?? groupLetters ?? bracketNumber ?? hostingTeamId % 10,
+				globalSuffix ??
+				groupLetters ??
+				bracketNumber ??
+				(hostingTeamId % 9) + 1,
 		};
 	}