修改题目31243错误的目标代码

题库0.3/Problems.json

@@ -562136,9 +562136,7 @@
     "031243": {
         "id": "031243",
         "content": "若数列$\\{a_n\\}$的前$n$项和$S_n=-3n^2+2n+1$($n\\in \\mathbf{N}$, $n\\ge 1$), 则$\\{a_n\\}$的通项公式为$a_n=$\\blank{50}.",
-        "objs": [
-            ""
-        ],
+        "objs": [],
         "tags": [
             "第四单元"
         ],
@@ -562159,7 +562157,8 @@
         "origin": "赋能练习-20230223修改",
         "edit": [
             "20220624\t朱敏慧, 王伟叶",
-            "20230223\t徐慧"
+            "20230223\t徐慧",
+            "20230630\t王伟叶"
         ],
         "same": [],
         "related": [