$TA table deleted but cannot Full Text Index still there.

Hi,

I am new to SAP HANA and I am working with Text Analysis.

Background:

I created Full Text Index on few columns. This generated the $TA tables but since I needed to change something so I deleted the $TA tables.

Problem:
I am now trying to create Full Text Index on few columns but each time I try to create Full Text Index, it says that 'column already indexed.'

Questions:

1 - How can I create Full Text Index again?

2 - After create Text Index with a configuration (let's say EXTRACTION_CORE_VOICEOFCUSTOMER), can one create Text Index with another configuration?

Appreciate your help!
Cheers.