diff --git a/pkg/apiserver/authentication/identityprovider/identity_provider.go b/pkg/apiserver/authentication/identityprovider/identity_provider.go
index 613c53eb0..7e93e8fd7 100644
--- a/pkg/apiserver/authentication/identityprovider/identity_provider.go
+++ b/pkg/apiserver/authentication/identityprovider/identity_provider.go
@@ -47,6 +47,10 @@ type Identity interface {
 
 // SetupWithOptions will verify the configuration and initialize the identityProviders
 func SetupWithOptions(options []oauth.IdentityProviderOptions) error {
+	// Clear all providers when reloading configuration
+	oauthProviders = make(map[string]OAuthProvider)
+	genericProviders = make(map[string]GenericProvider)
+
 	for _, o := range options {
 		if oauthProviders[o.Name] != nil || genericProviders[o.Name] != nil {
 			err := fmt.Errorf("duplicate identity provider found: %s, name must be unique", o.Name)
diff --git a/pkg/apiserver/authentication/identityprovider/identity_provider_test.go b/pkg/apiserver/authentication/identityprovider/identity_provider_test.go
index 96195c905..4ffeb5837 100644
--- a/pkg/apiserver/authentication/identityprovider/identity_provider_test.go
+++ b/pkg/apiserver/authentication/identityprovider/identity_provider_test.go
@@ -113,6 +113,12 @@ func TestSetupWith(t *testing.T) {
 					Type:          "LDAPIdentityProvider",
 					Provider:      options.DynamicOptions{},
 				},
+				{
+					Name:          "ldap",
+					MappingMethod: "auto",
+					Type:          "LDAPIdentityProvider",
+					Provider:      options.DynamicOptions{},
+				},
 			}},
 			wantErr: true,
 		},