diff --git a/packages/das/src/api/miners/miners.service.ts b/packages/das/src/api/miners/miners.service.ts
index 180953f..801d01b 100644
--- a/packages/das/src/api/miners/miners.service.ts
+++ b/packages/das/src/api/miners/miners.service.ts
@@ -202,6 +202,7 @@ export class MinersService {
             AND sp.pr_number      = i.solved_by_pr
             -- Skip null-author solving PRs (no one to credit)
             AND sp.author_github_id IS NOT NULL
+            AND BTRIM(sp.author_github_id) <> ''
             -- Skip corrupted MERGED-without-merged_at shape
             AND NOT (sp.state = 'MERGED' AND sp.merged_at IS NULL)
         ) AS solving_pr