SetKey change for host net mode for Phil

diff --git a/controller.go b/controller.go
index 83f30e7..3cc2ba7 100644
--- a/controller.go
+++ b/controller.go
@@ -410,7 +410,7 @@ func (c *controller) NewSandbox(containerID string, options ...SandboxOption) (S
 		containerID: containerID,
 		endpoints:   epHeap{},
 		epPriority:  map[string]int{},
-		config:      containerConfig{},
+		config:      sandboxConfig{},
 		controller:  c,
 	}
 	// This sandbox may be using an existing osl sandbox, sharing it with another sandbox
diff --git a/sandbox.go b/sandbox.go
index bd47394..b546eb4 100644
--- a/sandbox.go
+++ b/sandbox.go
@@ -56,7 +56,7 @@ type epHeap []*endpoint
 type sandbox struct {
 	id          string
 	containerID string
-	config      containerConfig
+	config      sandboxConfig
 	osSbox      osl.Sandbox
 	controller  *controller
 	refCnt      int
@@ -99,7 +99,7 @@ type resolvConfPathConfig struct {
 	dnsOptionsList       []string
 }
 
-type containerConfig struct {
+type sandboxConfig struct {
 	hostsPathConfig
 	resolvConfPathConfig
 	generic           map[string]interface{}
@@ -177,7 +177,7 @@ func (sb *sandbox) Refresh(options ...SandboxOption) error {
 	}
 
 	// Re-apply options
-	sb.config = containerConfig{}
+	sb.config = sandboxConfig{}
 	sb.processOptions(options...)
 
 	// Setup discovery files
@@ -279,7 +279,7 @@ func (sb *sandbox) SetKey(basePath string) error {
 	}
 
 	sb.Lock()
-	if sb.osSbox != nil {
+	if sb.osSbox != nil && !sb.config.useDefaultSandBox {
 		sb.Unlock()
 		return types.ForbiddenErrorf("failed to set sandbox key : already assigned")
 	}