diff --git a/models/workflow/workflow.go b/models/workflow/workflow.go
index dbe9dc6..c40ba30 100644
--- a/models/workflow/workflow.go
+++ b/models/workflow/workflow.go
@@ -2,16 +2,11 @@ package oclib
 
 import (
 	"encoding/json"
-	"fmt"
 	"slices"
-	"time"
 
-	"cloud.o-forge.io/core/oc-lib/dbs"
 	"cloud.o-forge.io/core/oc-lib/models/resources"
 	"cloud.o-forge.io/core/oc-lib/models/resources/workflow/graph"
 	"cloud.o-forge.io/core/oc-lib/models/utils"
-	"cloud.o-forge.io/core/oc-lib/models/workflow_execution"
-	"go.mongodb.org/mongo-driver/bson/primitive"
 )
 
 type AbstractWorkflow struct {
@@ -37,8 +32,8 @@ func (d *Workflow) GetName() string {
 }
 
 func (d *Workflow) CheckBooking() bool {
-	fmt.Println("CheckBooking", d.Schedule)
-	if d.Schedule != nil && d.Schedule.Start != nil {
+	return true
+	/*if d.Schedule != nil && d.Schedule.Start != nil {
 		sd := primitive.NewDateTimeFromTime(d.Schedule.Start.Add(time.Minute * -1))
 		var f dbs.Filters
 		if d.Schedule.End == nil {
@@ -60,7 +55,7 @@ func (d *Workflow) CheckBooking() bool {
 		res, _, _ := (&workflow_execution.WorkflowExecution{}).GetAccessor().Search(&f, "")
 		return len(res) == 0
 	}
-	return true
+	return true*/
 }
 
 func (d *Workflow) GetAccessor() utils.Accessor {
diff --git a/models/workflow/workflow_schedule.go b/models/workflow/workflow_schedule.go
index 18d0712..0d12a26 100644
--- a/models/workflow/workflow_schedule.go
+++ b/models/workflow/workflow_schedule.go
@@ -5,7 +5,7 @@ import "time"
 type WorkflowSchedule struct {
 	Id    string     `json:"id"`
 	Name  string     `json:"name" bson:"name" validate:"required"`
-	Start *time.Time `json:"start" bson:"start" validate:"required"`
+	Start *time.Time `json:"start" bson:"start" validate:"required,ltfield=End"`
 	End   *time.Time `json:"end,omitempty" bson:"end,omitempty"`
 	Cron  string     `json:"cron,omitempty" bson:"cron,omitempty"` // ss mm hh dd MM dw task
 }