LTP change without volume change

Does anyone know how/why LTP changes sometimes with no effect on volume?

For example, This is from Reliance (NSE) live feed data I captured using Kite API.

Tue Nov 05 2019 15:29:53 GMT+0530 (India Standard Time)
LTP = 1447.5
Volume = 5796042

Tue Nov 05 2019 15:29:54 GMT+0530 (India Standard Time)
LTP = 1447.6
Volume = 5796042

You can see there is no trade has been made as volume is same, however last trade price is changed?

Does anyone knows logic behind this?
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