@@ -169,6 +169,9 @@ private void UpdateFromRpcModel(RpcModel rpcModel)
169169        List < AgentViewModel >  agents  =  [ ] ; 
170170        foreach  ( var  agent  in  rpcModel . Agents ) 
171171        { 
172+             if  ( ! Uuid . TryFrom ( agent . Id . Span ,  out  var  uuid ) ) 
173+                 continue ; 
174+ 
172175            // Find the FQDN with the least amount of dots and split it into 
173176            // prefix and suffix. 
174177            var  fqdn  =  agent . Fqdn 
@@ -195,7 +198,7 @@ private void UpdateFromRpcModel(RpcModel rpcModel)
195198
196199            agents . Add ( _agentViewModelFactory . Create ( 
197200                this , 
198-                 agent . ParseId ( ) , 
201+                 uuid , 
199202                fqdnPrefix , 
200203                fqdnSuffix , 
201204                connectionStatus , 
@@ -207,18 +210,23 @@ private void UpdateFromRpcModel(RpcModel rpcModel)
207210        // dummy agent row. 
208211        foreach  ( var  workspace  in  rpcModel . Workspaces . Where ( w => 
209212                     w . Status  ==  Workspace . Types . Status . Stopped  &&  ! workspacesWithAgents . Contains ( w . Id ) ) ) 
213+         { 
214+             if  ( ! Uuid . TryFrom ( workspace . Id . Span ,  out  var  uuid ) ) 
215+                 continue ; 
216+ 
210217            agents . Add ( _agentViewModelFactory . Create ( 
211218                this , 
212219                // Workspace ID is fine as a stand-in here, it shouldn't 
213220                // conflict with any agent IDs. 
214-                 workspace . ParseId ( ) , 
221+                 uuid , 
215222                // We assume that it's a single-agent workspace. 
216223                workspace . Name , 
217224                // TODO: this needs to get the suffix from the server 
218225                ".coder" , 
219226                AgentConnectionStatus . Gray , 
220227                credentialModel . CoderUrl , 
221228                workspace . Name ) ) ; 
229+         } 
222230
223231        // Sort by status green, red, gray, then by hostname. 
224232        ModelUpdate . ApplyLists ( Agents ,  agents ,  ( a ,  b )  => 
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