Hyperswitch field-name is activity-level, cassandra field-name is activity_level.

2 possible solutions I (Joal) think of:

1. Drop/recreate/reload cassandra table - Allows to have the same field-name for cassandra-backend and hyperswitch - easier to maintain
2. Make hyperswitch do the conversion between external field-name and internal field name. More error prone on JS side.

I (Joal) suggest doing 1 as data is very small.