Do not compute configuration name from worker configurations store when removing a configuration

src/components/Process/Workers/Configurations/List.vue

@@ -342,8 +342,10 @@ export default {
        * potential race condition as updateWorkerRun causes workerId to be re-computed when a
        * configuration is first saved for a newly added worker run, which triggers
        * retrieveConfigurations again through a watcher.
+       * When removing a configuration, selectedConfigurationId is null.
        */
-      const configurationName = this.workerConfigurations[this.workerId][this.selectedConfigurationId].name
+      let configurationName = ''
+      if (this.selectedConfigurationId) configurationName = this.workerConfigurations[this.workerId][this.selectedConfigurationId].name
       try {
         await this.updateWorkerRun({
           processId: this.processId,