问如何修复Redux错误:最小化Redux错误#12

EN

INFO : BSG_KSCrashReport.c (1513): void bsg_kscrashreport_writeStandardReport(BSG_KSCrash_Context *const, const char *const): Writing crash report to /Users/Library/Developer/CoreSimulator/Devices/123/data/Containers/Data/Application/123/Library/Caches/KSCrashReports/foo/foo-123.json
2021-06-23 15:18:32.196550+1000 foo[12206:1933872] *** Terminating app due to uncaught exception 'RCTFatalException: Unhandled JS Exception: Error: Minified Redux error #12; visit https://redux.js.org/Errors?code=12 for the full message or use the non-minified dev environment for full errors. ', reason: 'Unhandled JS Exception: Error: Minified Redux error #12; visit https://redux.js.org/Errors?code=12 for the full message or use the non-minified dev environment for full errors..., stack:

The slice reducer for key "" returned undefined during initialization. If the state passed to the reducer is undefined, you must explicitly return the initial state. The initial state may not be undefined. If you don't want to set a value for this reducer, you can use null instead of undefined.