diff --git a/src/main/java/org/codelibs/fess/app/web/admin/badword/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/badword/CreateForm.java
index a3ce521ab..c7243f658 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/badword/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/badword/CreateForm.java
@@ -33,11 +33,9 @@ public class CreateForm {
     @Required
     public String suggestWord;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/boostdoc/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/boostdoc/CreateForm.java
index bc20a6e26..0e04d4f6b 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/boostdoc/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/boostdoc/CreateForm.java
@@ -43,11 +43,9 @@ public class CreateForm {
     @ValidateTypeFailure
     public Integer sortOrder;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/dataconfig/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/dataconfig/CreateForm.java
index ce28c560b..b2a4abfc3 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/dataconfig/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/dataconfig/CreateForm.java
@@ -70,11 +70,9 @@ public class CreateForm {
     @ValidateTypeFailure
     public Integer sortOrder;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/duplicatehost/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/duplicatehost/CreateForm.java
index f6d3e76f1..a508c196b 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/duplicatehost/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/duplicatehost/CreateForm.java
@@ -47,11 +47,9 @@ public class CreateForm {
     @ValidateTypeFailure
     public Integer sortOrder;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/elevateword/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/elevateword/CreateForm.java
index f6d68d70d..d0273cc5e 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/elevateword/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/elevateword/CreateForm.java
@@ -47,11 +47,9 @@ public class CreateForm {
     @ValidateTypeFailure
     public Float boost;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/fileauth/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/fileauth/CreateForm.java
index a5b1da5e2..31f0bbb80 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/fileauth/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/fileauth/CreateForm.java
@@ -58,11 +58,9 @@ public class CreateForm {
     @Size(max = 1000)
     public String fileConfigId;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/fileconfig/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/fileconfig/CreateForm.java
index 279a8c7b2..6599e01ff 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/fileconfig/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/fileconfig/CreateForm.java
@@ -105,11 +105,9 @@ public class CreateForm {
     @ValidateTypeFailure
     public Integer sortOrder;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/keymatch/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/keymatch/CreateForm.java
index f3e43f7b3..a8eb2b763 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/keymatch/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/keymatch/CreateForm.java
@@ -56,7 +56,6 @@ public class CreateForm {
     @Size(max = 255)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/labeltype/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/labeltype/CreateForm.java
index b24a7b4d0..1d84e523d 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/labeltype/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/labeltype/CreateForm.java
@@ -59,11 +59,9 @@ public class CreateForm {
     @ValidateTypeFailure
     public Integer sortOrder;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/pathmap/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/pathmap/CreateForm.java
index b71ff3cda..0b42ae5e8 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/pathmap/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/pathmap/CreateForm.java
@@ -51,11 +51,9 @@ public class CreateForm {
     @ValidateTypeFailure
     public Integer sortOrder;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/reqheader/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/reqheader/CreateForm.java
index b2f336f07..937339839 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/reqheader/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/reqheader/CreateForm.java
@@ -44,11 +44,9 @@ public class CreateForm {
     @Size(max = 1000)
     public String webConfigId;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/scheduler/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/scheduler/CreateForm.java
index 416c01027..8579ef88d 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/scheduler/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/scheduler/CreateForm.java
@@ -65,11 +65,9 @@ public class CreateForm {
     @ValidateTypeFailure
     public Integer sortOrder;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/webauth/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/webauth/CreateForm.java
index d77a0f777..1285756ae 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/webauth/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/webauth/CreateForm.java
@@ -61,11 +61,9 @@ public class CreateForm {
     @Size(max = 1000)
     public String webConfigId;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/webconfig/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/webconfig/CreateForm.java
index f8b365213..43c6e0424 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/webconfig/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/webconfig/CreateForm.java
@@ -111,11 +111,9 @@ public class CreateForm {
     @ValidateTypeFailure
     public Integer sortOrder;
 
-    @Required
     @Size(max = 1000)
     public String createdBy;
 
-    @Required
     @ValidateTypeFailure
     public Long createdTime;