FB 6.0. Unable to allocate memory when creating a package containing packaged temporary table with an index

[sim1984]

SQL> show version;
ISQL Version: WI-T6.0.0.1948 Firebird 6.0 3fadfab
Server version:
Firebird/Windows/AMD/Intel/x64 (access method), version "WI-T6.0.0.1948 Firebird 6.0 3fadfab"
Firebird/Windows/AMD/Intel/x64 (remote server), version "WI-T6.0.0.1948 Firebird 6.0 3fadfab/tcp (DESKTOP-MCH5AOF)/P20:C"
Firebird/Windows/AMD/Intel/x64 (remote interface), version "WI-T6.0.0.1948 Firebird 6.0 3fadfab/tcp (DESKTOP-MCH5AOF)/P20:C"
on disk structure version 14.0

SET TERM ^ ;

CREATE OR ALTER PACKAGE TEST_PKG
AS
BEGIN
  TEMPORARY TABLE T_PUBLIC (
    ID BIGINT NOT NULL,
    F BIGINT
  )
  UNIQUE INDEX IDX_T_PUBLIC_ID ON (ID)
  ON COMMIT DELETE ROWS;
END^

SET TERM ;^

Statement failed, SQLSTATE = HY001
unable to allocate memory from operating system

If the index is removed, the package with the table is created successfully.