TypeError: Cannot read property 'userKey' of undefined

[heineiuo]

    TypeError: Cannot read property 'userKey' of undefined

      1048 |     let level = 0
      1049 |     if ((await status.ok()) && meta.fileSize > 0) {
    > 1050 |       const minUserKey = meta.smallest.userKey
           |                                        ^
      1051 |       const maxUserKey = meta.largest.userKey
      1052 |       if (!!base) {
      1053 |         level = base.pickLevelForMemTableOutput(minUserKey, maxUserKey)

      at Database.userKey [as writeLevel0Table] (src/Database.ts:1050:40)
      at Database.compactMemTable (src/Database.ts:982:21)
      at Database.backgroundCompaction (src/Database.ts:727:7)
      at Database.backgroundCall (src/Database.ts:713:5)
      at Database.maybeScheduleCompaction (src/Database.ts:707:7)
      at Database.makeRoomForWrite (src/Database.ts:674:9)
      at Database.write (src/Database.ts:597:20)
      at Database.manualCompactMemTable (src/Database.ts:1232:5)
      at Database.compactRange (src/Database.ts:1166:5)