Can't set max-file-duration property due to type issue?

[pisymbol .]

2019-09-05 15:58:48,188 ERROR: could not convert '60000000000' to type
'guint64' when setting property 'GstMultiFileSink.max-file-duration'

Trying to set it to a minute in nanoseconds. This is gstreamer-1.14.5 on an
Ubuntu 18.04 run-time (arm64).

Is this just simply a bug?

-aps
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