diff --git a/models/formatter.go b/models/formatter.go
index 10cb769..d1a4df9 100644
--- a/models/formatter.go
+++ b/models/formatter.go
@@ -95,8 +95,8 @@ func (CallStat) TableName() string {
 type Breakdown struct {
 	ClientConversationId      string    `gorm:"primaryKey;index"`
 	InterpreterConversationId string    `gorm:"index"`
-	Timestamp                 time.Time `gorm:"index"`
-	Task                      string
+	Timestamp                 time.Time `gorm:"primaryKey;index"`
+	Task                      string    `gorm:"primaryKey"`
 	Duration                  int
 	Message                   string
 	Metadata                  *string `gorm:"type:json"`