diff --git a/CHANGELOG.md b/CHANGELOG.md
index be1bffcb..f03c4e80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # CHANGELOG
 
+## v0.4.25
+
+CHANGE: Creating a reserved share checks for token collision and returns a more appropriate error message (https://github.com/openziti/zrok/issues/531)
+
+CHANGE: Update UI to add a 'true' value on `reserved` boolean (https://github.com/openziti/zrok/issues/443)
+
 ## v0.4.24
 
 FEATURE: New `socks` backend mode for use with private sharing. Use `zrok share private --backend-mode socks` and then `zrok access private` that share from somewhere else... very lightweight VPN-like functionality (https://github.com/openziti/zrok/issues/558)
diff --git a/controller/share.go b/controller/share.go
index dbb22c2e..e2fbbcf5 100644
--- a/controller/share.go
+++ b/controller/share.go
@@ -135,6 +135,16 @@ func (h *shareHandler) Handle(params share.ShareParams, principal *rest_model_zr
 		sshr.FrontendEndpoint = &sshr.ShareMode
 	}
 
+	sh, err := str.FindShareWithToken(sshr.Token, trx)
+	if err != nil {
+		logrus.Errorf("error checking share for token collision: %v", err)
+		return share.NewShareInternalServerError()
+	}
+	if sh != nil {
+		logrus.Errorf("token '%v' already exists; cannot create share", sshr.Token)
+		return share.NewShareConflict()
+	}
+
 	sid, err := str.CreateShare(envId, sshr, trx)
 	if err != nil {
 		logrus.Errorf("error creating share record: %v", err)
diff --git a/rest_client_zrok/share/share_responses.go b/rest_client_zrok/share/share_responses.go
index 346cbdf3..8af0e374 100644
--- a/rest_client_zrok/share/share_responses.go
+++ b/rest_client_zrok/share/share_responses.go
@@ -41,6 +41,12 @@ func (o *ShareReader) ReadResponse(response runtime.ClientResponse, consumer run
 			return nil, err
 		}
 		return nil, result
+	case 409:
+		result := NewShareConflict()
+		if err := result.readResponse(response, consumer, o.formats); err != nil {
+			return nil, err
+		}
+		return nil, result
 	case 422:
 		result := NewShareUnprocessableEntity()
 		if err := result.readResponse(response, consumer, o.formats); err != nil {
@@ -238,6 +244,62 @@ func (o *ShareNotFound) readResponse(response runtime.ClientResponse, consumer r
 	return nil
 }
 
+// NewShareConflict creates a ShareConflict with default headers values
+func NewShareConflict() *ShareConflict {
+	return &ShareConflict{}
+}
+
+/*
+ShareConflict describes a response with status code 409, with default header values.
+
+conflict
+*/
+type ShareConflict struct {
+}
+
+// IsSuccess returns true when this share conflict response has a 2xx status code
+func (o *ShareConflict) IsSuccess() bool {
+	return false
+}
+
+// IsRedirect returns true when this share conflict response has a 3xx status code
+func (o *ShareConflict) IsRedirect() bool {
+	return false
+}
+
+// IsClientError returns true when this share conflict response has a 4xx status code
+func (o *ShareConflict) IsClientError() bool {
+	return true
+}
+
+// IsServerError returns true when this share conflict response has a 5xx status code
+func (o *ShareConflict) IsServerError() bool {
+	return false
+}
+
+// IsCode returns true when this share conflict response a status code equal to that given
+func (o *ShareConflict) IsCode(code int) bool {
+	return code == 409
+}
+
+// Code gets the status code for the share conflict response
+func (o *ShareConflict) Code() int {
+	return 409
+}
+
+func (o *ShareConflict) Error() string {
+	return fmt.Sprintf("[POST /share][%d] shareConflict ", 409)
+}
+
+func (o *ShareConflict) String() string {
+	return fmt.Sprintf("[POST /share][%d] shareConflict ", 409)
+}
+
+func (o *ShareConflict) readResponse(response runtime.ClientResponse, consumer runtime.Consumer, formats strfmt.Registry) error {
+
+	return nil
+}
+
 // NewShareUnprocessableEntity creates a ShareUnprocessableEntity with default headers values
 func NewShareUnprocessableEntity() *ShareUnprocessableEntity {
 	return &ShareUnprocessableEntity{}
diff --git a/rest_server_zrok/embedded_spec.go b/rest_server_zrok/embedded_spec.go
index c2a6856d..f04c18d0 100644
--- a/rest_server_zrok/embedded_spec.go
+++ b/rest_server_zrok/embedded_spec.go
@@ -909,6 +909,9 @@ func init() {
           "404": {
             "description": "not found"
           },
+          "409": {
+            "description": "conflict"
+          },
           "422": {
             "description": "unprocessable"
           },
@@ -2577,6 +2580,9 @@ func init() {
           "404": {
             "description": "not found"
           },
+          "409": {
+            "description": "conflict"
+          },
           "422": {
             "description": "unprocessable"
           },
diff --git a/rest_server_zrok/operations/share/share_responses.go b/rest_server_zrok/operations/share/share_responses.go
index d49c044e..9bf46588 100644
--- a/rest_server_zrok/operations/share/share_responses.go
+++ b/rest_server_zrok/operations/share/share_responses.go
@@ -108,6 +108,31 @@ func (o *ShareNotFound) WriteResponse(rw http.ResponseWriter, producer runtime.P
 	rw.WriteHeader(404)
 }
 
+// ShareConflictCode is the HTTP code returned for type ShareConflict
+const ShareConflictCode int = 409
+
+/*
+ShareConflict conflict
+
+swagger:response shareConflict
+*/
+type ShareConflict struct {
+}
+
+// NewShareConflict creates ShareConflict with default headers values
+func NewShareConflict() *ShareConflict {
+
+	return &ShareConflict{}
+}
+
+// WriteResponse to the client
+func (o *ShareConflict) WriteResponse(rw http.ResponseWriter, producer runtime.Producer) {
+
+	rw.Header().Del(runtime.HeaderContentType) //Remove Content-Type on empty responses
+
+	rw.WriteHeader(409)
+}
+
 // ShareUnprocessableEntityCode is the HTTP code returned for type ShareUnprocessableEntity
 const ShareUnprocessableEntityCode int = 422
 
diff --git a/specs/zrok.yml b/specs/zrok.yml
index 96afb2e0..29a596a0 100644
--- a/specs/zrok.yml
+++ b/specs/zrok.yml
@@ -603,6 +603,8 @@ paths:
           description: unauthorized
         404:
           description: not found
+        409:
+          description: conflict
         422:
           description: unprocessable
         500:
diff --git a/ui/src/console/PropertyTable.js b/ui/src/console/PropertyTable.js
index 355aec2d..14ccf711 100644
--- a/ui/src/console/PropertyTable.js
+++ b/ui/src/console/PropertyTable.js
@@ -18,7 +18,7 @@ const rowToValue = (row) => {
     if(row.property.endsWith("At")) {
         return new Date(row.value).toLocaleString();
     }
-    return row.value;
+    return row.value.toString();
 };
 
 const PropertyTable = (props) => {