diff --git a/src/lib/arg-parsing.ts b/src/lib/arg-parsing.ts
index 4105f90f5..118531831 100644
--- a/src/lib/arg-parsing.ts
+++ b/src/lib/arg-parsing.ts
@@ -315,7 +315,7 @@ export function parseSpanDepth(input: string): number {
     return 0;
   }
   const n = Number(input);
-  if (Number.isNaN(n)) {
+  if (Number.isNaN(n) || n < 0) {
     return DEFAULT_SPAN_DEPTH;
   }
   return n;
diff --git a/src/lib/db/pagination.ts b/src/lib/db/pagination.ts
index c702918d9..c51029fd7 100644
--- a/src/lib/db/pagination.ts
+++ b/src/lib/db/pagination.ts
@@ -84,7 +84,15 @@ export function getPaginationState(
     return;
   }
 
-  const stack = JSON.parse(row.cursor_stack) as string[];
+  let stack: string[];
+  try {
+    stack = JSON.parse(row.cursor_stack) as string[];
+  } catch {
+    db.query(
+      "DELETE FROM pagination_cursors WHERE command_key = ? AND context = ?"
+    ).run(commandKey, contextKey);
+    return;
+  }
   return { stack, index: row.page_index };
 }