diff --git a/dbstruct/vas_mysql.go b/dbstruct/vas_mysql.go
index 457da872..0c9dbe47 100644
--- a/dbstruct/vas_mysql.go
+++ b/dbstruct/vas_mysql.go
@@ -948,6 +948,9 @@ type ZoneUnlock struct {
 }
 
 func (p *ZoneUnlock) IsUnlockAdmission() bool {
+	if p == nil {
+		return false
+	}
 	if p.AdmissionCt == nil {
 		return false
 	}
@@ -958,6 +961,9 @@ func (p *ZoneUnlock) IsUnlockAdmission() bool {
 }
 
 func (p *ZoneUnlock) IsUnlockIronfanship() bool {
+	if p == nil {
+		return false
+	}
 	if p.IronfanshipCt == nil {
 		return false
 	}
@@ -968,6 +974,9 @@ func (p *ZoneUnlock) IsUnlockIronfanship() bool {
 }
 
 func (p *ZoneUnlock) IsUnlockSuperfanship() bool {
+	if p == nil {
+		return false
+	}
 	if p.SuperfanshipCt == nil {
 		return false
 	}