Get error ORA-20505 and ORA-01403 when UPDATING record

Question

Hi,
I'm running APEX 3.2.1, on Oracle XE 10.2.0.1, on Sun Ultra20 (Intel-based) running Windows Server 2003.
I created a small, department database - to keep track of contacts, equipment, etc.
Initially, I used a NUMBER as the PRIMARY KEY in both the CONTACTS table and EQUIPMENT tables. I created a CONTACTS interactive report and a CONTACT DETAILS form, where the EDIT button on a row in the CONTACTS report brings up the individual record to modify. Same thing for EQUIPMENT - interactive report page and form page.
This all worked fine!
Then, I decided to change the PRIMARY KEY for the CONTACTS table to a STRING - with CONTACT_FIRST_NAME and CONTACT_LAST_NAME as the primary key. I figured I this would prevent duplicate entries. After the change, inserts work. Updates work, IF a change is made to ANY field EXCEPT first name or last name.
UPDATES fail - if user modifies EITHER the first name or last name - in APEX. But, update SUCCEEDS if done in SQL Developer. Obviously, I missing a subtle nuance in APEX, but I can't figure it out.
I've included DEBUG trace and version information below.
Thanks,
Andy
ORA-20505: Error in DML: p_rowid=Adam1, p_alt_rowid=CONTACT_FIRST_NAME, p_rowid2=Adam, p_alt_rowid2=CONTACT_LAST_NAME. ORA-01403: no data found
0.02: A C C E P T: Request="SAVE"
0.02: Metadata: Fetch application definition and shortcuts
0.02: NLS: wwv_flow.g_flow_language_derived_from=FLOW_PRIMARY_LANGUAGE: wwv_flow.g_browser_language=en-us
0.02: alter session set nls_language="AMERICAN"
0.02: alter session set nls_territory="AMERICA"
0.02: NLS: CSV charset=WE8MSWIN1252
0.02: ...NLS: Set Decimal separator="."
0.02: ...NLS: Set NLS Group separator=","
0.02: ...NLS: Set date format="DD-MON-RR"
0.02: ...Setting session time_zone to -06:00
0.02: Setting NLS_DATE_FORMAT to application date format: DD-MON-YYYY
0.02: ...NLS: Set date format="DD-MON-YYYY"
0.03: Fetch session state from database
0.03: ...Check session 1896858759858984 owner
0.03: Setting NLS_DATE_FORMAT to application date format: DD-MON-YYYY
0.03: ...NLS: Set date format="DD-MON-YYYY"
0.03: ...Check for session expiration:
0.03: ...Metadata: Fetch Page, Computation, Process, and Branch
0.03: Session: Fetch session header information
0.03: ...Metadata: Fetch page attributes for application 101, page 21
0.05: ...Validate item page affinity.
0.05: ...Validate hidden_protected items.
0.05: ...Check authorization security schemes
0.05: Session State: Save form items and p_arg_values
0.05: ...Session State: Save "P21_CONTACT_FIRST_NAME" - saving same value: "Adam"
0.06: ...Session State: Saved Item "P21_CONTACT_LAST_NAME" New Value="Adam Jr"
0.06: ...Session State: Save "P21_CONTACT_COMPANY" - saving same value: "Atempo"
0.06: ...Session State: Save "P21_CONTACT_JOB_TITLE" - saving same value: "Sr Sw Engr"
0.06: ...Session State: Save "P21_CONTACT_JOB_ROLE" - saving same value: "Engineering"
0.06: ...Session State: Save "P21_CONTACT_STATUS" - saving same value: "Active"
0.06: ...Session State: Save "P21_CONTACT_PRODUCT" - saving same value: ""
0.06: ...Session State: Save "P21_CONTACT_PHONE" - saving same value: "222-333-4444"
0.06: ...Session State: Save "P21_CONTACT_MOBILE" - saving same value: ""
0.06: ...Session State: Save "P21_CONTACT_FAX" - saving same value: ""
0.06: ...Session State: Save "P21_CONTACT_EMAIL" - saving same value: ""
0.06: ...Session State: Save "P21_CONTACT_STREET" - saving same value: ""
0.06: ...Session State: Save "P21_CONTACT_CITY" - saving same value: ""
0.06: ...Session State: Save "P21_CONTACT_STATE" - saving same value: "CO"
0.06: ...Session State: Save "P21_CONTACT_ZIP" - saving same value: ""
0.06: ...Session State: Save "P21_CONTACT_COUNTRY" - saving same value: "United States"
0.06: ...Session State: Save "P21_CONTACT_NOTES" - saving same value: ""
0.06: Processing point: ON_SUBMIT_BEFORE_COMPUTATION
0.06: Branch point: BEFORE_COMPUTATION
0.06: Computation point: AFTER_SUBMIT
0.06: Tabs: Perform Branching for Tab Requests
0.06: Branch point: BEFORE_VALIDATION
0.06: Perform validations:
0.08: ...Item in validation equals expression 2: P21_CONTACT_JOB_ROLE
0.08: ...Item in validation equals expression 2: P21_CONTACT_STATUS
0.08: ...Item Not Null Validation: P21_CONTACT_PHONE
0.08: ...Item in validation equals expression 2: P21_CONTACT_STATE
0.08: ...Item in validation equals expression 2: P21_CONTACT_COUNTRY
0.08: Branch point: BEFORE_PROCESSING
0.08: Processing point: AFTER_SUBMIT
0.08: ...Process "Process Row of ISR_CONTACTS": DML_PROCESS_ROW (AFTER_SUBMIT) #OWNER#:ISR_CONTACTS:P21_CONTACT_FIRST_NAME:CONTACT_FIRST_NAME:P21_CONTACT_LAST_NAME:CONTACT_LAST_NAME|IU
0.08: Show ERROR page...
0.08: Performing rollback...
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
Database     
NAME     XE
CREATED     06/08/2010 05:22:50 PM
RESETLOGS_TIME     07/09/2010 10:09:59 AM
PRIOR_RESETLOGS_CHANGE#     193066
PRIOR_RESETLOGS_TIME     06/08/2010 05:22:52 PM
LOG_MODE     ARCHIVELOG
CHECKPOINT_CHANGE#     4436025
ARCHIVE_CHANGE#     4387159
OPEN_RESETLOGS     NOT ALLOWED
VERSION_TIME     07/09/2010 10:08:44 AM
OPEN_MODE     READ WRITE
PROTECTION_MODE     MAXIMUM PERFORMANCE
PROTECTION_LEVEL     MAXIMUM PERFORMANCE
REMOTE_ARCHIVE     ENABLED
DATABASE_ROLE     PRIMARY
ARCHIVELOG_CHANGE#     4458138
SWITCHOVER_STATUS     SESSIONS ACTIVE
DATAGUARD_BROKER     DISABLED
GUARD_STATUS     NONE
FORCE_LOGGING     NO
CGI Environment     
PLSQL_GATEWAY     WebDb
GATEWAY_IVERSION     2
SERVER_SOFTWARE     Oracle Embedded PL/SQL Gateway/10.2.0.1.0
GATEWAY_INTERFACE     CGI/1.1
SERVER_PORT     8080
SERVER_NAME     XDB HTTP Server
REQUEST_METHOD     GET
QUERY_STRING     p=4500:36:1896858759858984:::::
PATH_INFO     /f
SCRIPT_NAME     /apex
REMOTE_ADDR     10.135.65.180
SERVER_PROTOCOL     HTTP/1.1
REQUEST_PROTOCOL     tcp
REMOTE_USER     ANONYMOUS
HTTP_USER_AGENT     Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.19) Gecko/2010031422 Firefox/3.0.19 (.NET CLR 3.5.30729)
HTTP_HOST     isr-si-project:8080

Answer 1

Maybe because you're changing primary key...and then updating record with primary key that doesn't exist.