Fix types

src/main/java/cz/muni/ics/kypo/training/adaptive/service/training/TrainingRunService.java

@@ -243,7 +243,7 @@ public class TrainingRunService {
             Long userId = run.getParticipantRef().getUserRefId();
             runCommands = elasticsearchServiceApi.findAllConsoleCommandsByAccessTokenAndUserId(accessToken, userId);
         } else {
-            Long sandboxId = run.getSandboxInstanceRefId() == null ? run.getPreviousSandboxInstanceRefId() : run.getSandboxInstanceRefId();
+            String sandboxId = run.getSandboxInstanceRefId() == null ? run.getPreviousSandboxInstanceRefId() : run.getSandboxInstanceRefId();
             runCommands = elasticsearchServiceApi.findAllConsoleCommandsBySandbox(sandboxId);
         }