imp ... на сколько критичны ошибки

Connected to: Oracle8i Enterprise Edition Release 8.1.6.0.0 - Production
With the Partitioning option
JServer Release 8.1.6.0.0 - Production

Export file created by EXPORT:V08.01.06 via conventional path
import done in CL8MSWIN1251 character set and CL8MSWIN1251 NCHAR character set
. importing PIRUPIR's objects into PIRUPIR01
. . importing table                 "ATTACHEDFILE"
...........
                                                           11 rows imported
IMP-00017: following statement failed with ORACLE error 2261:
 "ALTER TABLE "ATTACHEDFILE" ADD  UNIQUE ("ID") ENABLE"
IMP-00003: ORACLE error 2261 encountered
ORA-02261: such unique or primary key already exists in the table
. . importing table                   "GALVERSION"
.....
                                                            5 rows imported
IMP-00017: following statement failed with ORACLE error 2261:
 "ALTER TABLE "GALVERSION" ADD  UNIQUE ("ID") ENABLE"
IMP-00003: ORACLE error 2261 encountered
ORA-02261: such unique or primary key already exists in the table
. . importing table                "INSTALLATIONS"
.....
                                                            5 rows imported
. . importing table                       "LEVELS"
.....
                                                            5 rows imported
IMP-00017: following statement failed with ORACLE error 2261:
 "ALTER TABLE "LEVELS" ADD  UNIQUE ("ID") ENABLE"
IMP-00003: ORACLE error 2261 encountered
ORA-02261: such unique or primary key already exists in the table
. . importing table                "NAMEMODULEGAL"
.....................
                                                           21 rows imported
IMP-00017: following statement failed with ORACLE error 2261:
 "ALTER TABLE "NAMEMODULEGAL" ADD  UNIQUE ("ID") ENABLE"
IMP-00003: ORACLE error 2261 encountered
ORA-02261: such unique or primary key already exists in the table
. . importing table                      "PIR2PIR"
...........................................................................
...............
                                                           90 rows imported
IMP-00017: following statement failed with ORACLE error 2261:
 "ALTER TABLE "PIR2PIR" ADD  UNIQUE ("ID") ENABLE"
IMP-00003: ORACLE error 2261 encountered
ORA-02261: such unique or primary key already exists in the table
. . importing table                     "PRIZNAKI"
.............
                                                           13 rows imported
IMP-00017: following statement failed with ORACLE error 2261:
 "ALTER TABLE "PRIZNAKI" ADD  UNIQUE ("ID") ENABLE"
IMP-00003: ORACLE error 2261 encountered
ORA-02261: such unique or primary key already exists in the table
. . importing table                       "STATUS"
.....
                                                            5 rows imported
IMP-00017: following statement failed with ORACLE error 2261:
 "ALTER TABLE "STATUS" ADD  UNIQUE ("ID") ENABLE"
IMP-00003: ORACLE error 2261 encountered
ORA-02261: such unique or primary key already exists in the table
. . importing table                        "USERS"
...................................................
                                                           51 rows imported
IMP-00017: following statement failed with ORACLE error 2261:
 "ALTER TABLE "USERS" ADD  UNIQUE ("ID") ENABLE"
IMP-00003: ORACLE error 2261 encountered
ORA-02261: such unique or primary key already exists in the table
About to enable constraints...
Import terminated successfully with warnings.

ORA-02261: such unique or primary key already exists in the table

BUFFER=8192
FILE=expPIRUPIRdat.dmp
INDEXES=Y
LOG=expLog.txt
OWNER=pirupir
ROWS=Y
COMPRESS=Y
CONSISTENT=Y
CONSTRAINTS=Y
DIRECT=N
FEEDBACK=0
GRANTS=Y
HELP=N

BUFFER=8192
COMMIT=N
FEEDBACK=1
FILE=expPIRUPIRdat.dmp
FROMUSER=pirupir
INDEXES=Y
LOG=impLog.txt
ROWS=Y
TOUSER=PIRUPIR01
SHOW=N