# Stop `GC` first
+ Backup will fail if `GC` happens in the backend
+ Manually increase `GC` lifecycle window before running `BR`
  + For example, `100 hours`, pick a reasonable value for your case
```
tidb> UPDATE SET VARIABLE_VALUE = ~!@'100h'@!~ 
   ->   WHERE VARIABLE_NAME = ~!@'tikv_gc_life_time'@!~;
```
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