Can't ADD COLUMN with 2.0.201-212cb2cfe

I have migrated successfully to the latest h2-2.0.201-212cb2cfe.jar and am able to open the database.
There is a table defined like that:

CREATE TABLE IFRSBOX.CFE.FEE_TYPE ( 
    ID_FEE_TYPE        CHARACTER VARYING(12) NOT NULL
    , DESCRIPTION        CHARACTER VARYING(255) NULL
);
CREATE UNIQUE INDEX PRIMARY_KEY_24C
    ON IFRSBOX.CFE.FEE_TYPE(ID_FEE_TYPE);

When I try to add a column, I get a very confusing error

ALTER TABLE cfe.fee_type
    ADD COLUMN id_fee_type_ref NUMBER (5) NULL
;

Syntax error in SQL statement "CREATE PRIMARY[*] KEY ""FEE_TYPE_COPY_3_3_PRIMARY_KEY_24C"" ON ""CFE"".""FEE_TYPE_COPY_3_3""(""ID_FEE_TYPE"")"; expected "OR, FORCE, VIEW, ALIAS, SEQUENCE, USER, TRIGGER, ROLE, SCHEMA, CONSTANT, DOMAIN, TYPE, DATATYPE, AGGREGATE, LINKED, MEMORY, CACHED, LOCAL, GLOBAL, TEMP, TEMPORARY, TABLE, SYNONYM, UNIQUE, HASH, SPATIAL, INDEX"; SQL statement:
ALTER TABLE cfe.fee_type
    ADD COLUMN id_fee_type_ref NUMBER (5) NULL [42001-201]

I do not think I did anything wrong because exactly this statement has worked a few times before with previous versions of H2 2.0.201.

Start by running the provided CREATE TABLE, CREATE UNIQUE INDEX, and ALTER TABLE statements against H2 2.0.201, then compare the same reproduction with the earlier H2 versions where it worked. Trace the ALTER TABLE path that generates the FEE_TYPE_COPY_3_3 index statement; done when the valid ADD COLUMN succeeds without the misleading syntax error.