Alter column in HANA table

i try to run this command in HANA database in PreProd platfrom and it gives syntax error, while im running the same command in Dev/QA and UAT

and it is running  successfully.

altertable XXX.YYYYYYYYY alter (DESC NVARCHAR(500));

Could not execute 'alter table "XXX"."YYYYYYYYY" alter("DESC" nvarchar(500))' in 2 ms 692 µs .

SAP DBTech JDBC: [257] (at 70): sql syntax error: incorrect syntax near " nvarchar": line 1 col 70 (at pos 70)