If an index exists, it is ready to be filled with data (and may already have data in it).
An index can be re-filled with database content by running a script to fill it.

Index Title	Index Name	Index Actions	Index Status	# Docs	Doc Actions
data	data	create	NOT existing	0 running
wordpress posts	post	create	NOT existing	0 idle
account	object_706033338	create	NOT existing	0 idle
channel	object_687174673	create	NOT existing	0 idle
collection	object_178313694	create	NOT existing	0 idle
commit	object_387209277	create	NOT existing	0 idle
company	object_603451615	create	NOT existing	0 idle
currency	object_529565757	create	NOT existing	0 idle
data category	object_553164125	create	NOT existing	0 idle
data class	object_953702411	create	NOT existing	0 idle
data format	object_759846265	create	NOT existing	0 idle
data importance	object_528624242	create	NOT existing	0 idle
data source	object_755424698	create	NOT existing	0 idle
data tool	object_992537501	create	NOT existing	0 idle
data type	object_141516161	create	NOT existing	0 idle
data valuetype	object_683243375	create	NOT existing	0 idle
data visibility	object_716934890	create	NOT existing	0 idle
definition	object_979189958	create	NOT existing	0 idle
elastic column format	object_1053291216	create	NOT existing	0 idle
file	object_232717732	create	NOT existing	0 idle
file category	object_458844228	create	NOT existing	0 idle
file format	object_429978404	create	NOT existing	0 idle
file ownership	object_439759901	create	NOT existing	0 idle
language	object_984938333	create	NOT existing	0 idle
lightbox	object_785650377	create	NOT existing	0 idle
link collection with object	object_893322213	create	NOT existing	0 idle
link company with object	object_336576702	create	NOT existing	0 idle
link recognition with object	object_398121967	create	NOT existing	0 idle
link street with object	object_715526801	create	NOT existing	0 idle
link_lightbox_file	object_400160250	create	NOT existing	0 idle
object type	object_806191472	create	NOT existing	0 idle
permission	object_1053285247	create	NOT existing	0 idle
recognition	object_579559736	create	NOT existing	0 idle
recognition category	object_540808428	create	NOT existing	0 idle
recognition version	object_186857302	create	NOT existing	0 idle
region	object_483821431	create	NOT existing	0 idle
region group	object_172499262	create	NOT existing	0 idle
region type	object_217159665	create	NOT existing	0 idle
street	object_258922746	create	NOT existing	0 idle
structure	object_645496740	create	NOT existing	0 idle