diff --git a/models/moderation/abuse_report.go b/models/moderation/abuse_report.go
index dadd61a95e..3a6244ef4c 100644
--- a/models/moderation/abuse_report.go
+++ b/models/moderation/abuse_report.go
@@ -100,7 +100,7 @@ type AbuseReport struct {
 	// The abuse category selected by the reporter.
 	Category AbuseCategoryType `xorm:"INDEX NOT NULL"`
 	// Remarks provided by the reporter.
-	Remarks string
+	Remarks string `xorm:"VARCHAR(500)"`
 	// The ID of the corresponding shadow-copied content when exists; otherwise null.
 	ShadowCopyID sql.NullInt64      `xorm:"DEFAULT NULL"`
 	CreatedUnix  timeutil.TimeStamp `xorm:"created NOT NULL"`
diff --git a/models/moderation/shadow_copy.go b/models/moderation/shadow_copy.go
index cdd8f69c52..d363610a48 100644
--- a/models/moderation/shadow_copy.go
+++ b/models/moderation/shadow_copy.go
@@ -17,7 +17,7 @@ import (
 
 type AbuseReportShadowCopy struct {
 	ID          int64              `xorm:"pk autoincr"`
-	RawValue    string             `xorm:"NOT NULL"`
+	RawValue    string             `xorm:"LONGTEXT NOT NULL"` // A JSON with relevant fields from user, repository, issue or comment table.
 	CreatedUnix timeutil.TimeStamp `xorm:"created NOT NULL"`
 }