Is it a bug ? I defined my data time and still getting the error?

I am trying to build a line chart in superset apache. I have time column it looks like this

time
---------
15:31:00 |
17:21:00 |
11:01:12 |
---------

I want to create a time chart with this data.

postgresql error: operator does not exist: text * interval LINE 1: ...ELECT DATE_TRUNC('day', (timestamp 'epoch' + time * interval... ^ HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.

this is the error that I always get. How can I change this in superset?