i want to update a partition key. the partition is as below

```
PARTITION_NAME  LAST_ANALYZED   NUM_ROWS    BLOCKS  SAMPLE_SIZE HIGH_VALUE
PORTAL_SERVICE_1    12/8/2016   4133    174 4133    1
PORTAL_SERVICE_2    6/8/2016    4474    174 4474    2
PORTAL_SERVICE_3    10/8/2016   29602   2014    29602   3
PORTAL_SERVICE_OTHERS   24/5/2016   0   110     DEFAULT

```

this partition is applied on column Portal\_Service\_id. i want to update the value of portal service id from 2 to 1.

when i try 

```
update trans set PORTAL_SERVICE_ID = 1 where ID = 2054;

```

i get error: 
Error report -
SQL Error: ORA-14402: updating partition key column would cause a partition change
14402. 00000 - "updating partition key column would cause a partition change"

i am not allowed to use Enable Row Movement.

Can anybody please suggest any alternative to update the row.

can anybody shed some light if this can be used in the scenario:

```
UPDATE <table_name> PARTITION (<partition_name>)
SET <column_name> = <value>
WHERE <column_name> <condition> <value>;

```