diff --git a/worldsrv/welfmgr.go b/worldsrv/welfmgr.go
index 4f447eb..2a3551b 100644
--- a/worldsrv/welfmgr.go
+++ b/worldsrv/welfmgr.go
@@ -2233,7 +2233,11 @@ func (this *WelfareMgr) ClearActivityNianData(p *Player) {
 		p.WelfData.NianData = nil
 		//清除任务数据
 		for id, _ := range p.WelfData.Task {
+			logger.Logger.Tracef("id = %d", id)
 			data := srvdata.PBDB_TaskMgr.GetData(id)
+			if data == nil {
+				continue
+			}
 			if data.ActivityType == common.TaskActivityTypeNianEveryDay || data.ActivityType == common.TaskActivityTypeNian {
 				delete(p.WelfData.Task, id)
 			}