core: bug fix

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.2.31",
+    "version": "3.2.32",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",

packages/hydrooj/src/model/problem.ts

@@ -304,7 +304,7 @@ export class ProblemModel {
             for (const pid of pids) {
                 if (!(r[pid] || l[pid])) {
                     if (doThrow) throw new ProblemNotFoundError(domainId, pid);
-                    else r[pid] = { ...ProblemModel.default, domainId, pid: pid.toString() };
+                    if (!indexByDocIdOnly) r[pid] = { ...ProblemModel.default, domainId, pid: pid.toString() };
                 }
             }
         }