| # Upgrade FAQs | |
| ## Version 3.x -> 5.0.0-alpha | |
| ### Collector | |
| ### Problem | |
| There is no information showing in the UI. | |
| ### Cause | |
| In upgrate from 3.2.6 to 5.0.0, Elasticsearch indexes aren't recreated, because not indexes exist, but aren't compatible with 5.0.0-alpha. | |
| When service name registered, the es will create this column by default type string, which is wrong. | |
| ### Solution | |
| Clean the data folder in ElasticSearch and restart ElasticSearch, collector and your under monitoring application. |