'Keys reported by tchmgr are incomplete

I have been actively using tokyocabinet in its tch variant for over a decade. For the first time, I see that tchmgr list a.tch | wc is smaller than the number shown by tchmgr inform a.tch | grep record

Example: 26149759 vs. 27729482

The keys that are missing in tchmgr list are all the recently added ones; but my keys are increasing (like padded integers: 00000, 00001, ...), so that there could be other effects. It did not happen to my largest db, but for a 500 GB one with the highest number of keys. Are there any limits (besides the 8 EB for database size, which is far away)?



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