UNIQUE clause is ignored for CREATE TABLE if SYNC clause is not set

[weres-sa]

Way to reproduce:

CREATE TABLE `unique_sync`
(
    category_id Int64 NOT NULL,
    id Int64,
    name Utf8,
    INDEX idx_global GLOBAL UNIQUE ON (category_id, id),
    PRIMARY KEY (category_id)
)

Expected:
Query succesfully creates table with unique sync index
OR
Query returns an error

Current behavior:
Query succesfully creates table with non-unique sync index