In Primavera P6
Remove Predecessor Relationships
Remove predecessor relationships is Details Predecessors or Relationships Remove → Yes; not Change predecessor, Unlink, or Delete Gantt

What a planner means
Remove predecessor relationships is Oracle Remove predecessor relationships. Project, Activities; select the activity; Display Activity Details; Predecessors or Relationships tab; select the predecessor; Remove; Yes. It is a command. It is not stored as its own table. It is not Change predecessor relationships, not Assign Predecessors, not Unlink Activities, not Delete relationships in the Gantt Chart, not Remove successor relationships, and not EPPM Delete Relationship copied onto Professional.
Oracle Remove predecessor relationships (Professional):
- "Choose Project, Activities."
- "Select the activity from which you want to remove a predecessor relationship."
- "Display Activity Details, then click the Predecessors or Relationships tab."
- "Select the predecessor you want to remove." "To view the predecessor's activity information before removing the relationship, click Go To."
- "Click Remove, then click Yes."
Quote those. Quote Go To, Remove, and Yes. That how-to fetched prints no type, no lag, no Comments, no Double-click the line, no Delete, and no menu item named Remove predecessor relationships. Do not invent those. Do not invent Edit > Remove predecessor relationships.
Change predecessor relationships is a different how-to. Same tab path; Remove without Yes or Go To. That page also prints Assign / Relationship Type / Lag. Do not collapse them. See Change Predecessor Relationships.
Assign Predecessors / Add predecessor relationships are different commands. Those create a relationship. This removes one. See Assign Predecessors.
Unlink Activities is a different command. Edit > Unlink Activities removes relationships between the selected activities. It does not print Go To, Remove, or Yes. See Unlink Activities.
Delete relationships in the Gantt Chart is a different how-to. Double-click the line → Delete → Yes. That is a Gantt line, not the Predecessors tab. See Delete Relationships in the Gantt Chart.
Remove successor relationships is a different how-to. Successors or Relationships tab. Do not collapse the titles.
View activity relationships in Activity Details is a different how-to. Show on Bottom tabs. View only. See View Activity Relationships in Activity Details.
Professional vs EPPM
Professional — Predecessors or Relationships tab; Go To; Remove; Yes. No Save on that page.
EPPM web — Oracle Creating Activity Relationships tip: "To delete a relationship, right-click the relationship line and select Delete Relationship." That is Gantt. Oracle Configuring Predecessor Relationships is Relationships detail window → field values → Save. Those pages fetched do not print Go To, Remove, or Yes. Do not copy Professional Go To / Remove / Yes onto EPPM. Do not copy EPPM right-click Delete Relationship / Save onto Professional.
Primavera Cloud is a different product. Do not copy it here.
XER
The command is not an XER table. After it runs you see a missing TASKPRED row. Oracle’s project XER map TOC has no REMOVEPRED / REMOVE_PRED / REMOVEPREDECESSOR table. Do not treat a missing TASKPRED as “the planner clicked Remove on the Predecessors tab.” A Viewer cannot tell this command from Unlink, Delete Gantt, Change Remove, import, or EPPM Delete Relationship.
Microsoft Project
Microsoft Change a task link: pick (None) from the Type list, or delete the predecessor row on Task Information. That is not P6 Remove predecessor relationships (Go To; Remove; Yes). Do not map them as the same command. Do not claim MPXJ writes a real MPP.
Don't
- Treat this as Change predecessor, Assign, Unlink, Delete Gantt, or Remove successor.
- Invent type, lag, Comments, Double-click the line, or a menu item on this how-to.
- Collapse Change predecessor Remove (no Yes / no Go To) onto this Remove → Yes / Go To.
- Copy EPPM right-click Delete Relationship / Save onto Professional, or Professional Go To / Remove / Yes onto EPPM.
- Invent a REMOVEPRED XER table, or reconstruct the command from a missing TASKPRED row.
- Map this to MSP Type (None) as the same command.
- Claim MPXJ writes a real MPP.
Sources
- Oracle Remove predecessor relationships [27 Aug 2026]
- Oracle Change predecessor relationships [27 Aug 2026]
- Oracle Add predecessor relationships [27 Aug 2026]
- Oracle Delete relationships in the Gantt Chart [27 Aug 2026]
- Oracle Creating Activity Relationships [27 Aug 2026]
- Oracle Configuring Predecessor Relationships [27 Aug 2026]
- Oracle XER project map TOC [27 Aug 2026]
- Oracle TASKPRED [27 Aug 2026]
- Microsoft Change a task link [27 Aug 2026]
- Related [27 Aug 2026]