diff --git a/src/lib/services/catalog-repair.ts b/src/lib/services/catalog-repair.ts
index 19c1581573..6e4fc372ea 100644
--- a/src/lib/services/catalog-repair.ts
+++ b/src/lib/services/catalog-repair.ts
@@ -506,12 +506,14 @@ export async function organizeCatalogAll(): Promise<OrganizeCatalogResult> {
 		const base = classname.split("*")[0];
 		return (base && furnilineByClass.get(base)) || "";
 	};
+	// The `caption_save` column is varchar(25). The line prefix `imp_line_`
+	// takes 9 chars, so the slug may be at most 16 chars to stay within limit.
 	const slug = (value: string): string =>
 		value
 			.toLowerCase()
 			.replace(/[^a-z0-9]+/g, "_")
 			.replace(/^_+|_+$/g, "")
-			.slice(0, 40);
+			.slice(0, 16);
 
 	// Minimum number of items a furniture line must have before it gets its own
 	// dedicated catalog page. Lines below this threshold (one-off customs, etc.)